Rock star Pete Doherty has been arrested on suspicion of possession of a Class A drug.
Doherty received a drugs treatment order in April 2006
The Babyshambles frontman was stopped in a car by police officers in High Street Kensington, west London, on Saturday at about 2200 BST.
The 28-year-old was taken to a police station and remanded on bail until June, a Scotland Yard spokesman said.
Doherty has appeared in court on a number of drug offences over the past six months.
He was recently praised by a judge for "more than co-operating" in his struggle to beat his addiction to hard substances.
He was ordered to take part in a treatment programme after admitting drug possession charges in April 2006.