Police are investigating after gunfire erupted in a suburban Ancaster neighbourhood, wedged between Mohawk Road and Highway 403.

Resident Greg Kesminas said he heard several shots a couple houses down from him on Oneida Boulevard between 6:15 and 6:30 p.m. Sunday.

"It was 'boom boom.' Three second pause and then 'boom, boom, boom, boom.'"

Kesminas was having Easter dinner in his backyard with his family when he heard the shots. He went to the front to see what was going on.

"It was quite literally two houses down from us."

Neighbours told him two cars were speeding down Oneida shooting at each other before they left the area, Kesminas said.

Police declined to say much about the developing investigation Sunday evening.

"We are investigating a shooting," Staff Sgt. Robin Abbott said around 8:20 p.m.

Divisional detectives were probing Oneida Boulevard between Seneca Drive and Algonquin Avenue.

Abbott said nobody there was hurt by the gunfire. She said it was too early to say whether cars were involved or whether police were pursuing suspects.

"We're still in the very early stages."

Kesminas said neighbours are pretty shaken by the incident, but he's not too fazed.

"They were passing by. It's not like they live here."