Doctors Without Borders Says It is Leaving Kunduz After Airstrike on Hospital

The situation in the war-torn Afghan city of Kunduz became more precarious for residents caught between government troops and Taliban militants after the withdrawal Sunday of an aid group that was one of the last providers of medical services there.

The aid organization, Doctors Without Borders, said it was leaving Kunduz, in northern Afghanistan, after a catastrophic airstrike on its hospital there on Saturday that killed 22 people, including 12 staff members, and destroyed the intensive care unit.

The Pentagon, which has said it may have inadvertently struck the hospital during a military operation, said in a statement on Sunday that a preliminary investigation of the episode would be completed in a matter of days. The Afghan government also vowed to investigate the airstrike.