A man lured a woman to the back of a Bradford pub before sexually assaulting her.
Police are appealing for information following the attack, which happened at about 3.35am on Monday, August, 11, in Westgate.
The 40-year-old victim was approached by a man at the front of the pub. He took her her around the back of the building and subjecting her to a serious sexual assault.
The suspect is described as Asian, in his early 20s and about 5ft 10ins tall.
He had longish black hair and was wearing a light grey hooded top, a black or dark blue hat with flaps on the side and dark grey tracksuit bottoms.
Detective Superintendent Simon Atkinson, of Protective Services (Crime), said: “This must have been a harrowing ordeal for the victim, who is now being supported by specially trained officers.
“We would appeal for anyone who saw anything suspicious in the Westgate area, either before or shortly after the incident to contact the police with any information they may have.
“We would also like to speak to two men who we believe were seen with the suspect that evening.
“Both men are believed to be Asian and in their late teens or early twenties. One was of quite stocky build, wearing a hat, a grey hooded top, grey tracksuit bottoms and dark blue trainers.
“The second man was wearing a blue hooded tracksuit top, which was made out of shiny material, tracksuit bottoms and dark trainers. He was riding a blue or silver mountain bike.”
Anyone with information is asked to contact police on 101 or Crimestoppers on 0800 555111.