Could a boxing or wrestling match among friends have contributed to a Burlington man's death? That's what police are trying to figure out. Investigators say they're not releasing the man's name until his family is notified.

"This is just so sad to see something like this happen," landlord Mark Porter said.

Porter rushed over when he heard about the commotion on Shelburne Road from a neighbor.

"It was fear at first because I didn't get the whole story until I came over here," he said. "I didn't know what happened."

Police responded to a 911 call around noon Sunday for an unresponsive man. Emergency crews tried to save the 29-year-old, but he later died.

Police said the death may be connected to a recreational boxing or wrestling match with an acquaintance at 4 a.m. Sunday.

"It didn't sound like an angry brawl at all. This wasn't a vindictive thing or anything like that from what I've heard from one of them," Porter said. "One of the tenants even said, 'This is so surreal.'"

Three men and a woman have lived in the apartment for about three years. Porter said they seemed like nice people.

"The place was spotless. I could always count on them to help me out when I was in a jam," he said.

Police are still working out exactly what happened. They were gathering evidence Sunday, but the crime tape was gone by Monday afternoon.

If you saw the boxing or wrestling match or know someone who did, police ask that you give them a call.