LIVE COVERAGE: 10 killed in Santa Fe High School shooting

#UPDATE Possible explosive devices have been located at the school and off campus. Law enforcement is in the process of rendering them safe. School has been evacuated. Call 911 if you see any suspicious item. #HouNews #SantaFeISD — Santa Fe ISD (@SantaFeISD) May 18, 2018

EMBED >More News Videos Harris County Sheriff Ed Gonzales brief media on the shooting at Santa Fe HS

It is with great sadness that I stand here to share with you that we experienced an unthinkable tragedy at our high school this morning. We are grieving the loss of members of our SFISD family. #SantaFeISD — Santa Fe ISD (@SantaFeISD) May 18, 2018

EMBED >More News Videos Santa Fe High School students being escorted out by officers after active shooter incident

EMBED >More News Videos Santa Fe High School student Leila Butler talks to ABC13 about the active shooter on campus.

EMBED >More News Videos President Trump gives remarks on the Santa Fe High School shooting.

We grieve for the terrible loss of life, and send our support and love to everyone affected by this horrible attack in Texas. To the students, families, teachers and personnel at Santa Fe High School – we are with you in this tragic hour, and we will be with you forever... pic.twitter.com/LtJ0D29Hsv — Donald J. Trump (@realDonaldTrump) May 18, 2018

We’re currently in protect mode as a precaution because of reports of a shooting at Santa Fe HS. Doors are locked & personnel are stationed at outer doors to let people in and out. No students allowed outside of building. Field trips are postponed until we go off of protect mode. — Dickinson ISD (@DickinsonISD) May 18, 2018

At least one gunman opened fire at a Santa Fe High School killing 10 people, most of them students, Governor Greg Abbott confirmed. Now possible explosive devices have been located both at the school, and at a site off campus. Anyone who sees anything suspicious is urged to call 911.Law enforcement sources tell ABC13 that 17-year-old Dimitrios Pagourtzis was the gunman in the deadly shooting.Santa Fe High School went on lockdown around 8 a.m.Governor Abbott also confirmed during a press conference Friday afternoon that 10 people were wounded in the shooting.Assistant Principal Cris Richardson said earlier in the day that a suspect had been arrested."We hope the worst is over, and I really can't say any more about that because it would be pure speculation," Richardson told reporters at the scene.Witnesses say the shooting took place in an art class on campus between 7:30 and 7:45 a.m. Students were evacuated from the building, and backpacks were searched before they were transported to Alamo Gym at 13306 Highway 6 to be reunited with their parents."We thought it was a fire drill at first but really, the teacher said, 'Start running,'" student Leila Butler said.President Donald Trump offered his condolences amid the tragedy.Other nearby school districts put protective measures in place as well.Santa Fe is roughly 36 miles outside of Houston. According to the Texas Education Agency, the high school enrollment is about 1,400 students.