A U.S drone on Sunday crashed in Pakistan's South Waziristan Agency. Conflicting reasons are being given for the drone crash at Sangar in Makeen area. The Taliban said they had shot down the unmanned aircraft, but local security officials told a news agency it was a result of technical problems. It was the second drone crash in a month in Pakistan. The debris was first taken by the Taliban, but security sources said Pakistani troops were later sent to seize it back. At least two militants were killed in the ensuing firefight, while one soldier was wounded. Drone attacks have escalated in the region since President Barack Obama took office in 2008. More than 100 raids were reported in the area last year. Pakistan publicly criticises drone attacks but observers say the authorities privately condone the strikes, although there have been recent signs that they want to limit the scope of such attacks.