This via CMU:

According to the NME friends of Libertines' Pete Doherty are now "very concerned for his well being" after the singer reportedly quit rehab for the second time in less than a month. As previously reported, Doherty quit (or possibly was chucked out of) the London branch of the Priory last month. He then went to a French rehab clinic where his mother and girlfriend were said to be close by in a bid to help him quit his drug addiction. However it seems he has now quit that facility. A spokesman for the band said yesterday: "Peter left The Priory this morning, his whereabouts are currently unknown although every effort is being made to find him. We are all very concerned for his well being."