About 2:45pm, a Ford Fairlane and a Toyota Corolla were travelling in opposite directions on Mount Darragh Road when they were involved in a head-on collision.

A 23-year-old man, who was driving the Ford, was trapped inside his vehicle and sustained serious head, chest and internal injuries.

A 70-year-old woman, who was a passenger in the Toyota, sustained suspected internal injuries.

Both were treated at the scene by paramedics and airlifted to Canberra Hospital in critical conditions.

A 70-year-old man, who was driving the Toyota, sustained a broken collarbone and was taken by ambulance to Bega Hospital in a serious but stable condition.

Detectives from Cooma are continuing investigations into the collision and urge anyone with information that could assist with inquiries to contact police.

Police are urging anyone with information about this incident to call Crime Stoppers on 1800 333 000.