A car speeding down a city street collided with a vehicle making a turn and smashed into a crowd of bystanders, killing a 6-year-old boy and three men and seriously injuring three others.

The boy and men were killed Monday evening when two cars sped down the street and one struck another car making a turn, city spokeswoman LaLosa Burns said. Witnesses said the two cars were racing, although police were still investigating Tuesday whether they were.

The boy who was killed, Jaylyn Adam Ellis, was in a vacant lot with a group of friends and relatives waiting for his turn to ride a four-wheeler on the warm evening, said his father, Jermaine Ellis, who was in his parked truck only a few feet away.

The others killed when the car spun and slid into the crowd were identified as Billy C. Muldrew Jr., 35, Benjamin Harper, 31, and Conrad Richardson, 28, who died at a hospital. All three were from Gary.

"When the smoke all cleared and I backed up, I saw everybody laid out," Jermaine Ellis said. "I jumped out and started yelling was everybody all right?"

The driver of the car that crashed into the crowd was in critical condition, and a passenger in the car was in serious condition Tuesday. Fred Brown, 84, of Gary, the driver of the car making a turn at the intersection, was in critical condition at Munster Community Hospital, Burns said.

She said at least 12 people were injured in the accident.

Police were looking for the driver of a black Mustang that also was speeding, Burns said. No charges have been filed because the investigation is ongoing, Burns said.

Elio Avecedo, the owner of Elio's Hot Dogs & Mexican at the intersection where the crash happened, said drivers had been speeding on the street all day, drawing many onlookers.

"They start doing it whenever the weather gets nice," he said.

The car that crashed into the crowd appeared to be racing another car, Avecedo said.

"That guy didn't put his brakes on even a little," he said. "I didn't even hear the brakes, and there was a crowd of people cheering them on."