A section of the R392 Lanesboro to Ballymahon road remains closed this morning following a serious crash.
Two men were airlifted to two separate hospitals following the collision at Derrylough.
The road remains closed this morning pending a technical examination by Forensic Collision Investigators.
Local diversions are in place.
Anyone with information is asked to contact Longford Garda Station on (043) 3350570, the Garda Confidential Line on 1800 666 111, or any Garda Station.