Three dead in two Tasmanian road crashes

Three people have been killed on a wet day on Tasmania's roads.

The latest fatality happened in the state's south after 4pm (AEST) on Thursday on the Channel Hwy at Oyster Cove where the road is expected to be blocked for some time.

About an hour earlier two people died when their car collided with a truck on Port Sorell Road at Wesley Vale in northern Tasmania.