A suicide attack on a NATO patrol in eastern Afghanistan killed two service members in the U.S.-led coalition on Wednesday, NATO and Afghan officials said.

The attack included small-arms fire, rocket-propelled grenades and a man wearing a vest laden with explosives, said Jamie Graybeal, a spokesman for the coalition.

The coalition gave no other details, but Din Mohammad Darwesh, a spokesman in Logar province, said the suicide bomber, who was on foot, struck the international soldiers as they were patrolling a section of Pul-i-Alam, the provincial capital.

The nationalities of the soldiers killed were not disclosed.

So far this year, 285 NATO service members have been killed in Afghanistan.