A man was killed and five others were injured in a spate of gun violence from Monday afternoon into Tuesday morning, Philadelphia police said.

Officers found Malcolm Claiborne, 25, shot in the neck and back on the 2900 block of Frankford Avenue in Kensington around 8:20 p.m. Monday.

Police said he and a friend had been involved in a heated argument with another person, who pulled out a gun and opened fire in the middle of the fight.

Claiborne fell where he was shot. His friend, hit in the chest, tried to run but collapsed a half-block away, police said. Officers rushed Claiborne and his friend, 22, to Temple University Hospital, where Claiborne was pronounced dead at 8:47 p.m. The surviving victim was listed in critical condition Tuesday.

Anyone with information on the case is being asked to call the homicide unit at 215-686-3334.

The incident was the third shooting in Philadelphia in five hours.

About 3:15 p.m. Monday, police officers arrived at Penn Presbyterian Medical Center for a report of a gunshot victim and interviewed a 43-year-old man who had been shot in the thigh.

The man told police he had been in a house on the 6400 block of Upland Street in Mount Moriah when three masked men - one armed with a gun - walked in. He told police the intruders asked for a man who wasn't there, then demanded money. He said he gave the men $20, and they shot him in the thigh.

No arrests had been made. Anyone with any information on the case is asked to call Southwest Detectives at 215-686-3183.

About a half-hour later in North Philadelphia, police responded to a report of a shooting on the 300 block of North 11th Street. In a house on that block, they found a 16-year-old boy who had been shot in the left calf and right ankle.

The teenager told police a masked man had chased him, firing a gun. He refused to tell the officers anything else, police said.

No arrests had been made, and police had not determined a motive in the case. They described the shooter as a thin black male between 16 and 18 years old, standing 6 feet to 6 feet 1 inch tall, wearing a light-gray hooded sweatshirt and a black ski mask.

Anyone with information on the case can call Central Detectives at 215-686-3093.

Two more men were wounded in shootings. Around 1:27 a.m. Tuesday, a 21-year-old man was walking down the 400 block of West Indiana Street in Fairhill when he saw three men in ski masks standing on the corner.

The group opened fire on him, he said, firing 10 to 15 shots. It was unclear which, or how many, of the men had shot at him, police said.

The man was hit twice in the groin and once in the buttocks, and ran down the street to his aunt's house. An ambulance took him to Temple University Hospital, where he remained in critical condition Tuesday.

No arrests had been made. Anyone with information on the incident is asked to call East Detectives at 215-686-3243.

At 2:54 a.m., inside a house on the 6400 block of Glenmore Avenue in Elmwood, a 35-year-old man was shot once in the chest, police said. He remained in critical condition at Penn Presbyterian.

No arrests had been made. Anyone with information on the case is asked to call Southwest Detectives at 215-686-3183.

awhelan@philly.com 215-854-2961@aubreyjwhelan