An air search was launched after a couple were assaulted in Flamborough on Tuesday night.
Police received a call at 11.30pm reporting an assault at the Viking Hotel, North Marine Road, Flamborough.
A man and a woman, both aged 49, were taken to Scarborough Hospital. Their injuries are not believed to be serious.
Police deployed a helicopter in search of the offender, thought to be a man in his 20s, but were unable to find him.
Anyone with information is asked to contact Humberside Police on 101 quoting log number 722 of Tuesday 21 May 2013.