KHOST (Reuters\\AFP) - A Taliban commander in southeastern Afghanistan said on Thursday a missing US soldier is being held by insurgents and is unharmed but warned the military he will be killed if they try to find him. The soldier has been missing in southeastern Paktika province since late June. Taliban commander Maulvi Sangin accused the US military of harassing and arresting Afghans in Paktika and neighbouring Ghazni province in their search for the soldier. They have put pressure on the people in these two provinces and if that does not stop we will kill him, Sangin, the Taliban commander for Paktika province, told a Reuters reporter by telephone from an undisclosed area. The soldier is fine and safe and our leadership council will decide about his fate, he said. US military spokeswoman Captain Elizabeth Mathias said the military had posted and distributed leaflets in Paktika and neighbouring Ghazni province calling for his safe return. One of our American guests is missing. Return the guest to his home, reads the leaflet, which includes a phone number and shows a US soldier shaking hands with smiling Afghan children. Mathias said another leaflet had been distributed which read: If you do not release the US soldier then you will be hunted. It shows US soldiers kicking in the door of a house. Meanwhile, Abdullah Jalali, a spokesman for Taliban commander Maulvi Sangin told a news agency telephonically Thursday the soldier would be killed unless the US stops airstrikes in Ghazni provinces Giro district and Paktika provinces Khoshamand district. Jalali did not explain why the Taliban chose those areas, noting only that Giro has been heavily bombed. Jalali said the final decision about the soldiers fate will be made by Taliban leader Mullah Omar. Meanwhile, a suicide attacker rammed a car bomb into a police convoy in southwestern Afghanistan on Thursday, killing three policemen and wounding four others, the government said. A police supply convoy came under attack from a suicide bomber. As a result, three border police, including their commander, were killed and four other police wounded, the interior ministry said. Afghanistan is gripped by an increasingly deadly insurgency waged by remnants of the Taliban, a militant group ousted from government by a US-led invasion in late 2001. The insurgency has seen the Taliban gain momentum every year and the hardliners now pose a threat to the stability of the war-torn country and its Western-backed government.