President Obama received a call today from President Karzai of Afghanistan, who reiterated his condolences for the tragic loss of 30 American service-members yesterday in Afghanistan. President Obama noted the extraordinary service of the Americans who gave their lives, and expressed his condolences for the Afghans who died serving by their side. The two Presidents reaffirmed their commitment to the mission in Afghanistan, which is critical to the security of both our countries, and agreed to stay in close contact.
Earlier today, President Obama placed calls to General Allen and General Votel in Afghanistan, and to General Mattis and Admiral Olson in Tampa, to express his condolences for those who were lost, and to reaffirm the American peoples' support for our men and women in uniform and their families.
Barack Obama, Readout of President Obama's Calls on Afghanistan Today Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/303218