An 18-year-old man being questioned about the murder of a Scotsman will become the fourth person to face charges in court this morning.
The teenager is due to appear at Derry Magistrates Court facing a murder charge.
Police arrested the 18-year-old over the killing of 36-year-old Ronald Mackie from Kippen in Stirlingshire eight days ago as he visited the province.
Mr Mackie was attacked by a mob outside Tobermore Football Club in County Derry before being pushed onto the road where he was struck by a car.
He had attended a loyalist band parade the night before in Maghera.
Three men have already appeared before magistrates charged with his murder.
Police yesterday revisited the scene of the murder and appealed for information from the public.
Motorists were stopped and people were also given leaflets urging them to help the investigation into Mr Mackie's death.
PA