A 49-year-old man from England has been assaulted and robbed in Londonderry.
He was attacked by a group of youths on the Limavady Road at about 21.30 GMT on Thursday as he made his way towards his hotel.
A short time later a woman in her late teens was attacked by the same group of youths in nearby Clooney Terrace.
Two men aged 17 and 19, and two women aged 17 and 18, were arrested. One of the women has been released on bail pending further inquiries.