A 35-year-old woman has died after being found unresponsive in the cells of a Lancashire police station.
The woman was taken to Greenbank police headquarters on Whitebirk Drive in Blackburn after being arrested in Darwen on Saturday, December 3.
At around 1.30am she was found to be unresponsive and taken to Royal Blackburn Hospital where she died on 6 December.
A police spokesperson said: "A 35 year old woman was arrested at an address in Darwen at around 11.30pm on Saturday, December 3rd on suspicion of assault.
"She was taken to Greenbank Police Station in Blackburn. At around 1.30am on Sunday the woman was found to be unresponsive in her cell and was taken to hospital but sadly subsequently died.
"Our thoughts are with her family and friends to whom we send our deepest condolences. We have referred the matter to the Independent Police Complaints Commission and as such it would be inappropriate to comment any further at this stage."
Friends and family laid flowers outside the police station in a ceremony yesterday.
The case has been referred to The Independent Police Complaints Commission who are investigating the incident.
AN IPCC Spokesperson said: "The Independent Police Complaints Commission (IPCC) has begun an independent investigation following the death of a woman detained by Lancashire Constabulary.
"IPCC investigators attended police post-incident procedures and have begun to gather evidence as part of the early stages of the investigation.