NEW ORLEANS (AP) — Gunfire wounded four people on New Orleans' famed Bourbon Street on Saturday night as a costumed crowd partied amid the countdown to Mardi Gras, sending people running, according to police and bystander accounts.

In a video taken by a witness and released by police Sunday, four shots ring out rapidly, followed by screams as some in the crowd stagger into one another and a nearby wall. Police said in an email that an argument involving one of the victims led to the shooting. They described the video as showing two men leaving the argument and returning with a third, then approaching the victim and shooting. A man whom police identified in a statement as one of the perpetrators moves deeper into the crowd and extends his arm as the gunfire erupts.

No arrests were immediately reported, and police said they were seeking three men who fled, including the one seen extending his arm.