A blast killed an Afghan policeman and wounded two of his colleagues on Wednesday, while two kidnapped intelligence officers were found dead, officials said. The violence comes as the first 150 British combat troops of a deployment of about 3,300 troops arrived in Afghanistan. Taliban, or members of an allied faction, were responsible for the blast that hit the second of two police vehicles travelling on a road in Ghazni, district government official Habibullah Jan said. "Militants who don't want peace and stability were behind this," he said. One of the wounded policemen was in serious condition, he said. The bodies of two intelligence officers abducted in the Farah province were found in a desert on Tuesday, said provincial governor Izatullah Wasifi. Earlier, police said security forces arrested a Taliban district commander, Mullah Nazer Shah, along with two of his men who were suspected of burning down a school in Ghazni.