Four students were injured, including three with gunshot wounds, after a shooting at Wilmer-Hutchins High School in Dallas on Tuesday afternoon, officials said.

Officials with Dallas Fire-Rescue confirmed the injuries and said the patients’ ages were 15 to 18. They had injuries that ranged from serious to non-life-threatening, the agency said.

Students were seen evacuating the main school building after the shooting was reported to authorities around 1 p.m.

“I turned around, all I heard was…