Young people are being encouraged to move in pairs following reports that a teenage girl has been raped by a man wearing a Halloween mask in Derry.
The attack happened in Edenmore Street near the Northland Road shortly before 1am yesterday morning.
Police say the man wore a Scream-type mask with blood over the face and was dressed in black.
Local Councillor John Boyle has condemned the attack and urged young people to be careful when on nights out.
He says as the attack occurred within the university area, young people in particular should be extra vigilant: