It is understood a 30-year-old man from the Arbroath area is in a critical condition in Ninewells Hospital following a road traffic collision on the A92 at Inverkeilor.
The crash occurred about 7 p.m. last night (Monday) when the VW Golf motor car he was driving collided with an articulated lorry.
The driver of the lorry was uninjured.
The road was closed by Police to allow an investigation to be carried out, and was still closed this morning.
Anybody who witnessed the collision should contact Police Scotland on 101, or speak to any police officer.