A confrontation about a series of loud parties ended with a 19-year-old man opening fire on a crowd of people and injuring two Tuesday night in the parking lot of Boardwalk Apartments, 524 Frontier Road, witnesses said.

A victim interviewed Wednesday said the shooting happened after people came outside to confront the suspect and some of his acquaintances about loud parties in the building.

“We were just yelling at them to be quiet or leave,” building resident Tim Will II said.

About 11:30 p.m., as the suspect was getting into a 1992 Pontiac Grand Am with two other people and preparing to leave, he allegedly opened fire at a group of at least four people who were standing on the second-floor balcony that runs along the front of the building.

“He was shooting directly at us, fired six rounds from a .38,” said Will, 22, who suffered a minor injury to his back from a bullet that went through a wooden slat before it hit him. His girlfriend, a 21-year-old Baldwin woman, was hit twice in the leg and was walking on crutches Wednesday, he said.

Will said that at the time of the shooting his sister already had called police to make a noise complaint.

Lawrence Police arrested the suspect, identified as Randy J. Johnson, moments after the shooting in a traffic stop in the 1100 block of West Sixth Street. They arrested him on suspicion of attempted second-degree murder and recovered a handgun during a search of the vehicle, said Sgt. Dan Ward, a police spokesman.

Johnson had not been charged as of Wednesday. His residence is listed as “transient” on Douglas County Jail records.

Ward said there had been two previous noise complaints this month at the building.