Philadelphia police are investigating two overnight killings that happened less than a mile apart in North Philadelphia.

The first happened shortly after 11 p.m., when a 53-year-old was beaten in the head with a blunt object outside a home on the 2800 block of North Fairhill Street, police said.

The exact weapon used wasn't known, but police at the scene told reporters that witnesses reported seeing a man running from the scene carrying some type of metal object.

Police this morning identified the victim as Miguel Aguilar and said he lived on the block where he was killed.

Aguilar was taken to Temple University Hospital, where he was pronounced dead at 11:44 p.m.

No arrests have been made and the motive for the killing wasn't known.

Then, just after midnight, two men were shot on the 2900 block of Waterloo Street.

One, a 36-year-old man, was pronounced dead at Temple University Hospital at 1:48 a.m. after suffering gunshot wounds to his chest and abdomen, police said. The other, age 20, was shot in his chest and back and remains in critical condition at Temple.

The slain man's name wasn't released because his family is still being notified.

No one has been arrested and it wasn't known what sparked the shooting.

Investigators are looking for a black man who is about 6 feet 2 inches tall and fled the scene on a yellow bicycle, initial police radio reports said. He was wearing black pants and a black hoodie.

There was no immediate indication the slayings were related, though both remain under investigation.