Several people were treated in hospital last night after violence broke out on the main Derry to Belfast road.
The trouble started when a group of loyalists travelling to Derry in a minibus damaged a mural in the Glenshane Pass and assaulted a farmer who tried to stop them.
A woman and her sons were also assaulted in their home on the Glenshane Pass, according to a local Sinn Féin councillor.
The PSNI said there had been clashes between two groups and that the minibus was taken to Magherafelt police station, where two of the occupants were arrested and the bus escorted on to Derry.
Those arrested were charged with assault and causing criminal damage and bailed to appear in court at a later date, said a spokeswoman.
Sinn Féin councillor Patrick Groogan said: "There was some drink taken and there were up to 30 young fellas on a bus. They sort of went berserk. "A mother and two children were hospitalised. They were taken away in the ambulance."