Pete Doherty has been arrested for suspected drug possession.The troubled Babyshambles rocker was detained in Tower Hamlets, east London, in the early hours of Monday. A Scotland Yard spokesman confirmed: "At 2.30am on Monday morning officers in Tower Hamlets arrested a 28-year-old man on suspicion of possessing drugs."Pete and two others, an unnamed man and woman, were held at an east London police station after officers stopped the car they were travelling in.The 28-year-old musician, who performed with his band at the V-Festival in Stafford late on Sunday, was ordered to quit drugs or face a prison sentence less than two weeks ago.Pete, who pleaded guilty to possession of crack cocaine, heroin, cannabis and ketamine as well as two driving offences in July, was given four weeks to get himself drug-free on August 6. District Judge Davinder Lachlar said at the time: "I will adjourn this matter until September 4 to assess his motivation. What I have in mind is a community order or prison. If he does not show the motivation in four weeks it will be prison - it's as simple as that."Judge Lachlar previously ordered Pete - who was stopped by police in Kensington High Street, west London, on May 5 - to undergo a detox treatment at a hearing in July.