A 43-year-old man was stabbed in the back Thursday night in downtown Windsor.

Police said it happened in a third-floor apartment building at 1250 Ouellette Avenue.

The reason the fight began remains under investigation.

"We're not getting 100 per cent cooperation at this point about what led to the altercation, but I believe the young man was asked to leave the apartment at some point and when he didn't go a fight broke out," said Windsor Police Sgt. Dave Kigar.

Police said blood was smeared on a wall in the stairwell.

They altercation began when four people in an apartment argued about the consumption of beer, Police said.

The suspect also threatened to stab another person. He fled the scene on a bicycle.

Officers arrested the suspect Friday morning in the city's east end.

"He was in a bit of an intoxicated state and was, according to officers, waiting for them to come in get him," said Kigar. "He knew what he had done and was expecting the police at any moment."

A 26-year-old Windsor man is charged with aggravated assault, two counts of assault with a weapon and four counts of breach of probation.

The victim was transported to Hotel-Dieu Grace Hospital where he remains in good condition.

Police said the victim and the suspect knew each other.