Two Antigo police department vehicles sit in front of the entrance to Antigo High School, April 24, 2016, where an 18-year-old gunman opened fire late Saturday outside of a prom at the school. 
Photo by Fred Berner/Antigo Daily Journal/AP

Antigo shooting: Gunman dies after opening fire outside of Wisconsin high-school prom

A teenage gunman shot two students outside of a Wisconsin high school’s prom on Saturday night, authorities said.

The incident took place outside of Antigo High School at around 11 p.m. local time (12 a.m. ET).

Antigo Police Chief Eric Roller said the suspect, Jakob E. Wagner, 18, showed up with a rifle and opened fire outside the prom, wounding two students who were exiting the event.

“Officers were in the parking lot patrolling the activities and heard the shots,” Roller said in a statement. “An officer immediately fired upon the shooter, stopping the threat.”

Wagner died early Sunday after “lifesaving measures” were administered at a local hospital, Roller said.

School district administrator Donald Childs said in a statement Sunday that one of the victims — an Antigo student — had received a non-life threatening injury and was undergoing surgery on his leg. The student’s date, who was from out-of-state, was treated Saturday night for a graze wound and released, Childs added.

Crisis counselors would be available for students upon their return Monday, he said.

Childs described Wagner as a “sometime student.” An acquaintance of the suspect’s, Dylan Dewey, said Wagner “was fun to be around.”

“When we talked it was always a good time,” Dewey said. “He would laugh and smile when around his friends.”

Dewey added that Wagner was dating someone at Antigo, though they’d recently broken up.

This story first appeared on NBCNews.com.

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Antigo shooting: Gunman dies after opening fire outside of Wisconsin high-school prom