BRIDGEPORT, Conn. (AP) — A gunman opened fire in a University of Bridgeport dining hall, injuring one person and prompting a campus lockdown as police searched for the suspect.

Police in Connecticut’s largest city said the victim was treated at a hospital for non-life-threatening injuries and that the shooter remained at large Wednesday. The lockdown was lifted shortly before 6am on Wednesday as police called it an “isolated incident” with no further threat to the public.

Authorities said the shooting happened shortly after 6:30 p.m. Tuesday, and officers arrived minutes later to a chaotic scene. The shooting involved two youths who were not students at the college, police said. The men knew each other, and the shooting appeared to be the result of an argument, authorities said.

Police Chief Roderick Porter said the victim was alert and talking to police Tuesday night. He said several people were in the dining room at the time and he did not immediately know how many shots were fired.

“We want to reassure the students, parents, faculty and residents of Bridgeport that the area is safe,” Porter said in a statement. “To further enhance the security of the area, a police presence will be maintained on the University of Bridgeport campus until the suspect is brought to justice.”

The private college’s president, Danielle Wilken, said the dining hall was open to the public Tuesday night because of campus sporting events.

The nonprofit school has approximately 4,100 students and alumni.