One person was killed and three others hurt in a shooting inside a downtown Minneapolis bar late Tuesday night, police said.

It happened at a bar on the 400 block of Fourth Street South around 11:40 p.m.

Responding officers found "a large, unruly crowd involved in physical altercations," the Minneapolis Police Department said. There was an event at the bar at the time, and all the tables were sold out.

A 21-year-old man with multiple gunshot wounds died at the scene, despite first responders' efforts. Another man and two women were taken to Hennepin Healthcare with survivable injuries.

Police arrested one person for obstruction, but made no arrests connected to the shooting.

"An argument inside a crowded bar should never end in gunfire and a loss of life," Police Chief Brian O'Hara said. "Our investigators are working to identify everyone involved and hold those responsible accountable."

Anyone with information is asked to contact police.