The Independent Police Complaints Commission is investigating the circumstances surrounding an incident in which a man became seriously ill in British Transport Police custody.

The 24 year-old man was arrested by BTP officers at Northwick Park Underground Station at approximately 14.50pm Wednesday afternoon (10.8.11) and taken to Wembley Park Police Station Custody Suite. While in custody he became ill and was taken to hospital, where he remains in a serious condition.

Commissioner Sarah Green, who will oversee the investigation, said:

"We have met with members of the man's family to discuss our role and our investigation will seek answers to the important questions they no doubt have.”