Police in Oregon set up a tip line Saturday and asked for witnesses to come forward with any information about a shooting that injured six people outside a concert.

Axar.az reports that officers responded to the WOW Hall in Eugene after reports of a shooting near the venue’s rear entrance around 9:30 p.m. Friday. They arrived to find chaos and began rendering aid, including applying tourniquets, the Eugene Police Department said in a news release Saturday.

“What law enforcement found when they came on the scene is what you would exactly expect when six people just got shot,” Eugene Police Chief Chris Skinner said at a news conference. “People are just trying to get out of here, their friends are on the ground, they’re trying to help.”

Five people were taken to the hospital, and one walked in for treatment after being transported privately, police said. One patient remained in critical condition Saturday; police described the condition of the others as stable. Two of the wounded are female and four are male, police said.