A number of people have been taken to hospital following a crash between a car and a suspected stolen vehicle near Enniskillen in Co Fermanagh this morning.
A number of arrests have been made.
One of the cars involved had been reported stolen in Dublin and police had been following it from the M1.
As is routine, the Police Ombudsman's Office has been informed.
It is not believed at this stage that any of the injuries are life-threatening.
Traffic on the main road between Enniskillen and Fivemiletown is being diverted at Lisbellaw and Tamlaght.