A NATO strike in the eastern Afghan province of Nangarhar killed at least 12 civilians, an official said, as President Hamid Karzai ordered a probe into the incident. “Coalition forces had an operation last night. In one place, Nakrkhail village, they hit one vehicle and killed 12 civilians,” said Mohammad Hassan, district chief of Khogyani district in Nangarhar. “In another place, Hashimkhail village, they launched an operation on some houses and 14 people were killed. It's not clear how many of them are civilians or Taliban. There are some civilians among them,” Hassan said. Bomber kills 7 police officers A suicide car bomber struck a convoy of NATO troops and Afghan police Thursday in northern Afghanistan, killing seven police officers and wounding at least 11 people. A Canadian helicopter, meanwhile, went down in southern Afghanistan. – Agencies No one was injured and the Taliban claimed it shot the aircraft down. The suicide bombing occurred in the morning in Kunduz province's Imam Sahib district, the Interior Ministry said in a statement. In addition to the deaths, six police and five civilians were wounded, it said. No NATO troops were killed in the bombing, said Maj. Michael Johnson, a NATO forces spokesman. Some NATO forces were wounded, but he declined to say how many or how seriously.