A French police special forces unit hunting an anti-Semitic serial killer launched a pre-dawn raid Wednesday on a house where a man claiming al-Qaeda ties was holed up, a police source said. Two police were slightly wounded as the operation got underway, led by officers investigating three attacks by a lone gunman in which three off-duty soldiers, three Jewish school children and a rabbi were killed, he said. A source close to the inquiry told AFP that the suspect had exchanged words with the RAID team and had declared himself to be a member of al-Qaeda, the armed Islamist group founded by late Saudi extremist Osama bin Laden. French Interior Minister Claude Gueant had arrived at the scene, in the Croix-Daurade district of the southwestern city of Toulouse, scene of two of the shooting incidents over the previous nine days, he said.