By Alisha Haridasani

At least 10 people were killed at a Texas high school on Friday when a student with a gun opened fire shortly after the school day started.

Law enforcement officials identified the suspected gunman as 17-year-old Dimitrios Pagourtzis, a junior at Santa Fe High School. At least one other person has been detained as a person of interest, Texas Governor Greg Abbott said.

At a news conference Friday afternoon, Abbott said that 10 people were killed and 10 others wounded. Harris County Sheriff Ed Gonzalez said earlier in the day that most of the victims are thought to be students at the school.

Abbott also confirmed that several explosive devices were found in and around the school, at the suspect's home, and in his vehicle. The gunman used a shotgun and a .38 revolver taken from his father, Abbott said. They were legally owned, and it's not clear whether the suspected gunman's father knew his son had taken them.

Witnesses in Santa Fe, Texas, about 35 miles southeast of Houston, said the gunman stormed into an art class before 8 a.m., local time. The Santa Fe Independent School District said on Twitter that an unknown number of "explosive devices" were found in the school and near the campus.

"Everybody was just trying to get away from the school. They kept saying there was a shooter, people were shot," said 16-year-old John Robinson, a sophomore at Santa Fe High School.

The fact that students around the country walk into schools everyday, knowing that an incident like this is a very real possibility is “horrifying,” said Becca DeFelice, the San Antonio volunteer leader with Moms Demand Action.

President Trump, speaking in the East Room of the White House after the shooting, said, “This has been going on for too long in our country — too many years, too many decades now."

“My administration is determined to do everything in our power to protect our students, secure our schools, and do everything we can to keep weapons out of the hands of those who pose a threat to themselves and to others,” he said.

Calls for gun reform after a shooting rarely turn into action because Republicans have been blocking pending bills from reaching the floor of the House, said Rep. Al Green, a Democrat who represents Texas’s 9th District.

“When all is said and done, more is said than done,” Green said in an interview with Cheddar Friday.

This school shooting comes just three months after the attack in Parkland, Fla., which reanimated the national gun debate that seems to emerge every few months.

David Hogg, a Parkland shooting survivor and a gun control activist, tweeted, “We are fighting for you.”

For the full interview, click here.