The 17-year-old reportedly plays on the Santa Fe High School junior varsity football team, and is a member of a dance squad with a local Greek Orthodox church.

1:05 p.m.

A law enforcement official has identified a person in custody in the Houston-area school shooting as 17-year-old Dimitrios Pagourtzis.

The official was not authorized to discuss the shooting by name and spoke on condition of anonymity to The Associated Press.

Authorities say eight to 10 people, mostly students, were killed in the nation's deadliest such attack since the massacre in Florida that gave rise to a campaign by teens for gun control.

A woman who answered the phone at a number associated with the Pagourtzis family declined to speak with the AP.

She said: "Give us our time right now, thank you."

Pagourtzis plays on the Santa Fe High School junior varsity football team, and is a member of a dance squad with a local Greek Orthodox church.

 

11:45 a.m.

Authorities say possible explosive devices have been found at and adjacent to the Texas high school where a shooting left as many as 10 people dead.

The Santa Fe Independent School District said in a statement Friday that authorities are in the process of rendering the devices safe.

There's no indication how many devices have been found. Police asked the public to "remain vigilant" and to call 911 if they see any suspicious items in the area.

The school outside Houston went on lockdown around 8 a.m. after an active shooting was reported.

Harris County Sheriff Ed Gonzalez says there "could be 8 to 10 fatalities" from the shooting. Gonzalez says the majority of the dead are students.

The sheriff says one person is in custody and a second person has been detained.

 

11:30 a.m.

SANTA FE, Texas (AP) — At least one gunman opened fire at a Houston-area high school Friday, killing eight to 10 people, most of them students, authorities said.

Harris County Sheriff Ed Gonzalez said he could not be precise about the number of deaths at Santa Fe High School, which went on lockdown around 8 a.m. Two suspects believed to be students were in custody.

It was the nation's deadliest school shooting since the February attack in Parkland, Florida, that killed 17 people and re-energized the gun-control movement after surviving teens launched a campaign for reform.

The school district confirmed an unspecified number of injuries but said it would not immediately release further details. A school police officer was being treated at a hospital, the sheriff said, but there was no immediate word on the extent of his injuries.

"We hope the worst is over, and I really can't say any more about that because it would be pure speculation," Assistant Principal Cris Richardson Richardson told reporters at the scene.

Aerial footage showed students standing in a grassy field and three medical helicopters landing at the school in Santa Fe, a city of about 13,000 residents roughly 30 miles (48 kilometers) southeast of Houston.

School officials said law enforcement officers were working to secure the building and move students to another location. Students were being transported to another location to reunite with their parents.

One student told Houston television station KTRK in a telephone interview that a gunman came into her first-period art class and started shooting. The student said she saw one girl with blood on her leg as the class evacuated the room.

"We thought it was a fire drill at first but really, the teacher said, 'Start running,'" the student told the television station.

The student said she did not get a good look at the shooter because she was running away. She said students escaped through a door at the back of the classroom.

Authorities did not immediately confirm that report.

The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding to the shooting.

In the aftermath of the Feb. 14 attack on Marjory Stoneman Douglas High School, survivors pulled all-nighters, petitioned city councils and state lawmakers, and organized protests in a grass-roots movement.

Within weeks, state lawmakers adopted changes, including new weapons restrictions. The move cemented the gun-friendly state's break with the National Rifle Association. The NRA fought back with a lawsuit.

In late March, the teens spearheaded one of the largest student protest marches since Vietnam in Washington and inspired hundreds of other marches from California to Japan.

 

10:30 a.m.

Officials say at least three people are being treated for gunshot wounds and two people have been detained following a shooting at a high school near Houston.

Harris County Sheriff Ed Gonzalez tweeted Friday that one person is in custody and a second person has been detained following the Friday morning shooting at Santa Fe High School.

Gonzalez says a police officer was injured but the extent of the officer's injuries is unknown.

Gonzalez says there are "multiple casualties" but didn't elaborate. Houston-area media have cited unnamed law enforcement officials saying there were fatalities. The Associated Press has not been able to confirm the reports.

Dr. David Marshall is chief nursing officer at the University of Texas Medical Branch in Galveston. He says one man was undergoing surgery at the hospital Friday morning following the shooting. He says a juvenile has been admitted and a second adult is being treated in the emergency room.

 

10:15 a.m.

SANTA FE, Texas (AP) — Houston-area media citing unnamed law enforcement officials are reporting that there are fatalities following a shooting at a local high school Friday morning.

Television station KHOU and the Houston Chronicle are citing unnamed federal, county and police officials following the shooting at Santa Fe High School, which went on lockdown around 8 a.m. The Associated Press has not been able to confirm the reports.

The school district has confirmed an unspecified number of injuries but said it wouldn't immediately release further details. Assistant Principal Cris Richardson said a suspect "has been arrested and secured."

"We hope the worst is over and I really can't say any more about that because it would be pure speculation," Richardson told media outlets at the scene.

School officials said law enforcement officers were working to secure the building "and initiate all emergency management protocols to release and move students to another location." Students from the high school were being transported to another location to reunite with their parents.

One student told Houston television station KTRK in a telephone interview that a gunman came into her first-period art class and started shooting. The student said she saw one girl with blood on her leg as the class evacuated the room.

"We thought it was a fire drill at first but really, the teacher said, 'Start running,'" the student told the television station.

The student said she didn't get a good look at the shooter because she was running away. She said students escaped through a door at the back of the classroom.

Authorities have not yet confirmed that report.

Aerial footage from the scene showed students standing in a grassy field and three life-flight helicopters landing at the school in Santa Fe, a city of about 13,000 residents roughly 30 miles (48 kilometers) southeast of Houston.

The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding to a shooting at the school.

There was a large law enforcement response to the same school in February when it was placed on lockdown after students and teachers said they heard "popping sounds." Santa Fe police swept the campus but found no threat.

 

An earlier version of this story appears below.

SANTA FE, Texas (AP) — Injuries have been confirmed after a shooting Friday at a high school near Houston and the suspected shooter has been arrested, according to school officials.

Assistant Principal Cris Richardson confirms that an active shooter was on campus at Santa Fe High School, which was placed on lockdown about 8 a.m. She said the shooter has since been "arrested and secured."

The school district issued a statement saying injures have been confirmed but no details would be immediately released. School officials said law enforcement officers were working to secure the building "and initiate all emergency management protocols to release and move students to another location."

Students from the high school are being transported to another location to reunite with their parents.

"We hope the worst is over, and I really can't say any more about that because it would be pure speculation," Richardson told media outlets at the scene.

One student told Houston television station KTRK in a telephone interview that a gunman came into her first-period art class and started shooting. The student said she saw one girl with blood on her leg as the class evacuated the room.

"We thought it was a fire drill at first but really, the teacher said, 'Start running,'" the student told the television station.

The student said she didn't get a good look at the shooter because she was running away. She said students escaped through a door at the back of the classroom.

Authorities have not yet confirmed that report. Aerial footage from the scene showed students standing in a grassy field and three life-flight helicopters landing at the school.

The U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding to a shooting at the school.

There was a large law enforcement response to the same school in February when it was placed on lockdown after students and teachers said they heard "popping sounds." Santa Fe police swept the campus but found no threat.

Santa Fe is a city of about 13,000 residents located 30 miles southeast of Houston.