IPCC probe into man's death in custody in Preston
The death of a 53-year-old man in police custody in Lancashire is being investigated by the police watchdog.
Bogdan Wilk was detained at Preston police station on 6 March, after being arrested on suspicion of assault.
He was seen by a nurse and doctor after reporting an existing heart condition and requesting medication.
Mr Wilk, of Preston, was charged early the next day. At 0520 GMT, he was found unresponsive in his cell. He was pronounced dead shortly afterwards.
Lancashire Police referred Mr Wilk's death to the Independent Police Complaints Commission (IPCC), which decided to launch an investigation.
The watchdog said initial indications were that Mr Wilk had died from natural causes.
IPCC Commissioner Naseem Malik said: "My thoughts are with Mr Wilk's family at this difficult time.
"Our investigators have met with them to explain our involvement.
"The investigation will examine all the circumstances surrounding Mr Wilk's detention, with a focus on Lancashire Constabulary's policies and procedures and the welfare shown to him when in custody."