LILLE - Robbers posing as police briefly locked up Lille striker Pierre-Alain Frau in the boot of his Mercedes car in the early hours of Monday, before releasing him in another part of town and stealing the vehicle. Local police said that as Frau was getting into his car, he was approached by hooded men in a car with flashing lights who presented themselves as police. He was on his way home from a late-night dinner after Lille's 2-1 defeat by Lorient on Sunday. The attackers forced the Ligue 1 player to get into the boot of his car, which they then drove across town. They released Frau on the street in a residential area before making off with his vehicle, credit card, mobile phone and hundreds of euros. It is the second time in 10 months that Frau has been targeted by carjackers. Another vehicle was stolen from him in October last year. His club said he was unhurt and had taken part in training with his team mates on Monday morning.