PROVIDENCE — Bullets were fired into a house, into a car and into the air in four incidents of gunshots being fired Friday, Saturday and Sunday.

The police are investigating three of the incidents. In the fourth case — two patrolmen and a state trooper heard a shot in the vicinity of Hanover Street, South Providence, Friday night — the police could find no physical evidence of a shooting.

The first confirmed incident occurred in the wee hours Friday morning, when someone fired shots into a 1995 Honda Accord parked at the rear of 53 March St., Wanskuck. While tenants in the area reported having heard numerous shots, nobody said he or she had seen anything.

The police recovered five .40-caliber shell casings and one .45-caliber shell casing from March Street.

At about 3 a.m. Sunday, the police were dispersing a large crowd at the 7-Eleven store at Weybosset and Eddy streets downtown when they heard a shot from the vicinity of Dorrance and Pine streets.

Officers went there and spotted a gray car, which sped away. Cruisers followed the car onto Route 195 west and then Route 95 north, and then the operator of the car turned off his headlights and kept going at a high rate of speed, the police said.

The pursuit speed touched 100 mph in the vicinity of the Branch Avenue off-ramp, according to the police, at which point the pursuit was broken off for safety’s sake.

Later Sunday morning, officers were called to 138 Regent Ave., in the Valley neighborhood, for a report of a shot fired into a house at that address. Jose Oliva, 55, who lives there, said he heard a loud bang from in front of the house at about 4:30 a.m. but could find nothing amiss.

When he awakened later that morning, he found plaster from the bedroom wall on his bed. The police discovered a bullet hole in the exterior of the house.