Eighteen people have been injured in a collision between a bus and a truck on the N2 outside Castleblayney in Co Monaghan.
One person sustained serious but not life-threatening injuries in the crash.
Gardaí say there were around 30 people on the bus at the time.
It is understood one person was trapped on board the bus for a time.
The road is closed and local diversions are in place.
Motorists are advised to avoid the area.