Students at a Texas school that’s been plagued by two shootings in a year said they are too afraid to return — as cops revealed that Tuesday’s alleged gunman managed to slip through an unsecured door before opening fire on his fellow students.

The 17-year-old suspect is facing aggravated assault mass shooting charges after the latest violence at Wilmer-Hutchins High School in Dallas on Tuesday that left four teens injured, police said.

The rampage, which was allegedly sparked by a dice game, unfolded almost one year to the day that a student was injured in a classroom shooting at the school.

A 17-year-old male student is facing aggravated assault mass shooting charges after four teens were injured, police said. KTVT

“It was very traumatic, honestly, and it was the second time that happened,” Deliyah Martin, a junior, told KLTV, adding she was among those fearful of returning.

“They told me, ‘Get down, turn the lights off,’ my teacher locked the door, did all the procedures that they were supposed to do, and we just sat there.”

Her mom, Tamika Martin, said she is fed up following the second shooting.

“Honestly, I’m afraid for my daughter to even go back to that school at all because I don’t feel like she’s safe there,” Martin said.

The suspect in the latest incident was captured on surveillance cameras bypassing metal detectors after being let into the building through an unsecured door on Tuesday afternoon, according to the arrest warrant.

He then allegedly walked down the hall and opened fire on a group of students, including taking a point-blank shot at one of them, the warrant said.

Deliyah Martin and her mom said they are fearful for the junior to return. KTVT

Four students, ages 15 to 18, were injured in the shooting and taken to hospitals, cops said.

Two had been discharged as of Wednesday, while the other two remained hospitalized but were expected to recover.

Christina Smith, assistant police chief for the Dallas Independent School District, insisted during a news conference that the firearm didn’t come into the school during “regular intake time” — adding that “it was not a failure of our staff, of our protocols, or of the machinery that we have.”

In the aftermath, students said the school’s metal detectors were working and a clear-bag policy was being enforced.

Four students, ages 15 to 18, were injured in the shooting and taken to hospitals, cops said. AP

It wasn’t immediately clear if those policies were enacted in the wake of last year’s shooting, which unfolded on April 12.

Dallas Independent School District trustee Maxie Johnson told the local outlet that he had hosted a town hall in the wake of the initial incident to address gun violence.

“As a father who lost his son to senseless gun violence, I understand what parents are going through,” he said. “The nervousness. The anxiety.”

“We’re going to continue to stand together and advocate for more resources and advocate to make sure that our kids are safe,” he added.