Three men were shot early Thursday inside a bar in the Gardenville neighborhood of Northeast Baltimore, according to city police.

An officer on patrol heard the gunshots about 12:30 a.m. from Club Uzo in the 4800 block of Belair Road. He and other officers went inside and found a 20-year-old man who had been shot once in the leg. He was taken to Johns Hopkins Hospital in serious condition.

Police spokesman Anthony Guglielmi said officers found a second victim on Belair Road, just outside the bar's front entrance, also suffering from a gunshot wound to the leg. The 30-year-old was also taken to Hopkins in serious condition. The third victim, 23, managed to get out of the bar on his own and was taken by a friend to Hopkins. Police said he had been shot twice in the legs and was in critical condition.

Detectives have no suspects.

"All we know is that it was some type of altercation," Guglielmi said. "It's unclear whether these victims were targets of the gunman or were innocent bystanders."