A man was fatally shot outside of his apartment in Columbia early Thursday, authorities said.

Omar Oliver, 39, was shot around 1:30 a.m. outside the Berkshires of Columbia apartment complex, in the 5200 block of Brook Way, following an altercation with one or more unknown people, Howard County police said.

According to police, a family member heard an argument and gun shots outside the apartment building, and looked out the window to find Oliver on the ground in a grassy area nearby. Another family member ran outside and performed CPR until paramedics arrived.

Oliver had been shot multiple times and was pronounced dead at the scene, police said.

Detectives do not have a description or known motive of the shooter or shooters. It is unknown how many people were involved in the shooting or what the argument was about. Investigators followed up on an initial possible lead Thursday morning, but “the information did not pan out,” police said in a news release.

Anyone with information can call 410-313-STOP.