Police investigations are continuing into allegations a man was raped in Heckmondwike.

Specialist officers are still speaking to the 23-year-old-man, who police have said was seriously sexually assaulted in the early hours of Monday morning.

The assault is said to have taken place by another man he had met earlier in the evening at around 3am in an alleyway off Albion Street.

The suspect was described as white and wearing tracksuit bottoms.

Anyone with information is asked to contact police on 101.

In unrelated investigations, police would like to speak to the people pictured in the image gallery below. The people pictured in the images may be witnesses as well as suspects. If you recognise anyone, contact police on 101 quoting the reference number on the image caption.