One woman on the bus suffered serious facial injuries and had to be taken to hospital for treatment
Four people have been injured after stones were thrown at a bus in Dungiven, County Londonderry.
The bus was carrying spectators of the Apprentice Boys parade in Derry city centre back to Belfast on Saturday evening.
A man and three women suffered injuries in the attack. One of the women has been taken to hospital for treatment to serious facial injuries.
A 16-year-old youth has been arrested.
Deputy First Minister Martin McGuinness tweeted, external that the incident had been "shameful".
