Afghanistan ? A suicide bomber targeted a NATO patrol in a marketplace filled with children Tuesday, killing 13 elementary school students and at least four other people. The U.N. and NATO quickly condemned the attack for harming so many civilians.

Eight Dutch soldiers patrolling on foot – the apparent targets – and at least 35 Afghans were wounded in the bombing in southern Uruzgan province, one of the deadliest in Afghanistan this year. The Taliban claimed responsibility.

The bomber struck around 9 a.m., when children usually arrive at a nearby primary school for a second shift of classes. Schools in Afghanistan often serve three rotations of students.

The bomber blew himself up outside a pharmacy as the Dutch patrol entered the market.