A man is dead after his motorcycle collided with a truck in southeast Calgary Friday morning.

The accident happened on Portland Street and 11 Street S.E. in Ramsay at about 8 a.m. MT, police said. 

The deceased man, 21-years-old, was driving a 2005 Yamaha motorcycle northbound on 11 Street S.E.  A five-tonne truck was heading southbound on same street. Both drivers were approaching Portland Street.

"The truck turned left in front of the approaching motorcycle in order to head eastbound on Portland Street. The operator of the Yamaha braked quickly, but struck the right side of the truck and was knocked off his motorcycle," police said in a press release.

"The driver of the motorcycle was pronounced deceased at the scene. Neither of the occupants in the truck were injured."

Police, who are investigating, believe speed was a factor in the collision.