UPDATE: 10 People Have Been Pronounced Dead & Dimitrios Pagourtzis is the Shooter

Authorities have identified the suspect in Friday’s shooting at Santa Fe High School that killed 10 people.

NBC News reported that law enforcement sources have identified the suspect as 17-year-old Dimitrios Pagourtzis.

Harris County Sheriff Ed Gonzalez said that the suspect and another person being questioned in connection with the shooting are students at the school.

Gonzalez said a majority of those that were killed in the shooting were students. He said a Santa Fe Independent School District police officer was critically injured in the shooting.

Officials at UTMB Hospital in Galveston said the facility had received at least three patients from the scene, including the Santa Fe ISD police officer, a 16-year-old boy and a middle-aged woman. The officer is listed in critical condition. The two others suffered gunshot wounds to the leg and are listed in good condition.

A search of the school is ongoing, Gonzalez said.

Santa Fe ISD officials said in tweets that explosive devices were found at the school and at off-campus locations:

We will update you with more information about this tragedy.