March 11, 2012
President Obama called President Karzai to express his shock and sadness at the reported killing and wounding of Afghan civilians. President Obama extended his condolences to the people of Afghanistan, and made clear his Administration's commitment to establish the facts as quickly as possible and to hold fully accountable anyone responsible. The President reaffirmed our deep respect for the Afghan people and the bonds between our two countries.
Barack Obama, Readout of the President's Call with President Karzai Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/299846