A man was killed and three injured in overnight violence Friday into Saturday morning, Philadelphia police said.

At 6:05 p.m. Friday, 16th District officers were called to the 700 block of North Dekalb Street in Mantua, where they found a 61-year-old man with a gunshot wound to his chest. He was taken to Penn Presbyterian Medical Center, where he died about 90 minutes later, police said.

No one had been arrested in the incident, and police would not release the man's name.

Just before 11 p.m. Friday, police from the 17th District were called to a shooting on the 1400 block of South 19th Street in Point Breeze, where they found a 50-year-old man who had been shot in the lower left leg.

The officers took him to Penn Presbyterian, where he was listed in stable condition, police said.

The victim told police he was walking into his house when he heard five or six gunshots and felt a bullet hit his leg. He said he had seen several people gathered outside a Chinese restaurant on the street just before the shooting, but no one had been arrested and police had not determined a motive in the case.

The shooting also damaged the windshield of a car on the street, police said.

On Saturday, just after 2 a.m., 22d District officers arrived on the 2300 block of North 20th Street in North Philadelphia for a report of a person with a weapon.

The officers found a woman, 38, on the front step of a house with stab wounds to her chest and face. She was taken to Temple University Hospital, where she was listed in critical condition.

Police said that the victim knew the woman who attacked her. The two had been fighting on the street, and the fight continued into a house - ending when the victim staggered onto the front steps with multiple stab wounds.

At 7:51 a.m. Saturday, 22d District police also responded to a shooting on the 1700 block of North Dover Street in Brewerytown. The victim, a 37-year-old man, had been shot several times and was taken to Temple Hospital, where he was listed in stable condition.

No arrests had been made in the case, and no weapons were recovered, they said.

awhelan@philly.com 215-854-2961