An inquest in Co Monaghan into the death of two men in a head on collision between two lorries has been told a driver with traces of heroin in his body had crossed the white line onto the wrong side of the road several times before the fatal collision.

A pathologist's report said 32-year-old Klaidas Bakanas from Carrickmacross had still multiple traces of anxiety and depressant drugs in his system after his vehicle struck and killed 30-year-old Declan Holian from Ramelton, Co Donegal, on the N2 in January 2016.

Both drivers died in a collision described by an investigating garda as the worst he had ever seen.