DETECTIVES are investigating after a woman was subjected to a serious sexual assault in the early hours of this morning. 

The 36 year-old was assaulted by a man near to a grassed area in Little Green Lane, Heckmondwike, in what is known locally as the 'Six Lane Ends' area of the town.

The victim is said to have met the man in the Acapulco Nightclub in Waterhouse Street, Halifax, on Saturday night, before they left together in a taxi from outside the club.

The taxi was described as a white mini-bus.

The taxi driver dropped them off in Little Green Lane and then left the scene.

The incident is said to have happened at around 4am.

A scene remains in place at Little Green Lane, to allow for specialist officers to conduct a detailed search of the area.

The suspect is described as a white man, in his late 20s, with short brown hair and brown eyes.

He is 5ft 10in tall and of average build.

He was wearing a dark blue shirt, cream jeans, and black shoes.

Detective Inspector Seth Robinson, of Kirklees District CID, said: "The victim is being supported by specially-trained officers and we are carrying out extensive enquiries to trace the suspect.

"We are appealing for the taxi driver to come forward.

"We would also like to hear from anyone who was in the area at this time and who may have heard or seen anything suspicious, or anyone with any information that could assist with the investigation to get in touch."

Anyone with any information is asked to call Kirklees District CID, via 101, quoting crime reference 13170136730, or Crimestoppers, anonymously, on 0800 555111.