Akhir 05 , 1432 H. / March 10, 2011 -- US special forces killed a cousin of President Hamid Karzai when they stormed a house in southern Afghanistan, a district governor said Thursday, according to dpa. The troops conducted the raid Wednesday night in Kandahar province's Dand district after arriving by helicopter, Governor Hamdullah Nazek said. "Haji Yar Mohammad Khan was martyred in the operation," said Nazek, who declined to provide further details. "We are investigating the incident now." Ahmad Wali Karzai, the president's younger brother and head of Kandahar's provincial council, also confirmed the death, saying his cousin was "mistakenly" killed by the US forces. President Karzai has repeatedly lashed out at foreign troops for civilian casualties that have been caused primarily by airstrikes and nighttime raids. Last week, the president rejected an apology from US General David Petraeus, the top commander of the NATO-led International Security Assistance Force (ISAF) as well as US troops in Afghanistan, after ISAF troops killed nine children in eastern Afghanistan in an airstrike. The president said that such apologies were "not enough" and "no longer acceptable."