Authorities are investigating after a man on a bicycle was hit and killed by a dump truck in Dorchester, police said.

The man, whose name was not released last night, was hit by the truck in the area of East Cottage Street at about 1:50 p.m. and pronounced dead at the scene.

Cops closed off a portion of the street yesterday while investigators laid out evidence markers and looked over a crumpled bike.

Yellow crime scene tape blocked access to the entrance of a large commercial property located in an industrial area near Uphams Corner.

Police said the driver of the truck that hit the cyclist remained on scene and cooperated with investigators.

The truck involved in the crash is registered to Ace Trucking, a company in Exeter, N.H. The owner of the company didn’t return calls for comment last night.

Police said no charges have been filed in connection with the incident.

In the first half of the year, 151 cyclists were injured in crashes in Boston and one reported fatality, according to city data.

Police said the cause of yesterday’s collision remains under investigation.