A CYCLIST is fighting for his life after a collision between his bicycle and a truck in Hobart’s CBD.

The man, aged in his 50s, was taken to hospital with suspected broken arms and leg and a head injury after the crash in Molle St about 12.30pm.

Police said the collision happened as the truck was turning into a building site. The man was trapped under the truck before being freed by rescuers.

He remains in a critical condition.

Anyone who witnessed the crash or may have any information is asked to contact Crime Stoppers on 1800 333 000.