NEW ORLEANS — Four people were wounded in gunfire on the city’s famed Bourbon Street as a costumed crowd partied amid the countdown to Mardi Gras, sending people running, the police and bystanders said.

Four shots were fired Saturday night, followed by screams, a video taken by a bystander and released by the police showed. The authorities said an argument involving some of those in the crowd led up to the shooting. No arrests were immediately reported and the police said they were seeking three men.

Those wounded included a man who was shot in the abdomen, thigh and pelvis along with another man and two women, a spokesman for the New Orleans Police, Frank B. Robertson, said. His statement said the others were also hit by gunshots: the man in the buttocks, one woman on the chin and right foot and the other on a toe.

The police had said late Saturday that the most severely wounded man was in critical condition and undergoing surgery while the others were stable. They did not give their names or ages.