Detectives of West Yorkshire Police's Homicide and Major Enquiry Team continue to investigate the sexual assault of a young woman along a canal towpath at the weekend.
This is what we know so far about the investigation.
Where and when did it happen?
The attack happened along a section of the towpath of the Calder and Hebble Navigation Canal between the Cromwell Bottom Nature Reserve and the Colliers pub. It happened some time between 6.30am and 7.50am on Monday, October 19.
READ MORE: READ MORE: Sex attack on 20-year-old woman on canal towpath in Elland
What have the investigating officers police said?
West Yorkshire Police said the crime had been initially reported to them as an assault, but that it was later classed as a serious sexual assault. The woman was assaulted and then sexually assaulted by three men, leaving her with injuries that needed hospital treatment.
DCI Sue Jenkinson, of the force's Homicide and Major Enquiry Team, said: “We are investigating what is clearly a very serious offence which has come to light as the victim has gained in confidence and now fully disclosed what took place.
“She continues to be supported by officers and we are carrying out a number of enquiries into what took place.
“I would like to speak with anyone who can assist the investigation or who may have seen or have information about three men who we believe were on the towpath at around the time of the attack.
Detectives make a renewed appeal for help
Investigating officers are particularly keen to speak with anyone who may have home or vehicle CCTV covering the route of the canal between Park Road and Elland Road or covering access points to the canal area.
Has anyone been arrested?
A 44-year-old man has been arrested on Thursday morning in connection with the offence.The man was questioned and officers are continuing to appeal for witnesses and information.
He has been released under investigation by the police.
How can you help?
Anyone who has information is asked to contact the Homicide and Major Enquiry Team on 101 referencing crime number 13180545115. Information can also be given anonymously to the independent Crimestoppers charity on 0800 555 111.