Syracuse police are still trying to figure out what happened to a man who was found dead on a CENTRO Bus over the weekend.

Investigators say initial reports were that the man may have been sniffing from compressed air dust canisters while he was on the bus Saturday.

His body was discovered after the bus was returned to the CENTRO garage later that day.

The man's name has not been released, but he was said to be in his 50s.

CENTRO officials provided a brief statement that says the company is cooperating with the investigation.