KABUL, Afghanistan—The international military coalition in Afghanistan says two of its service members have been killed in a bomb attack in the country's south.

The NATO-led alliance said in a statement issued late Monday that the blast occurred earlier that day. It did not provide further details or the nationalities of the dead. The coalition usually waits for member nations to identify their dead before providing specifics on attacks.

There have been at least 384 international service members killed so far this year, the vast majority of them Americans.