Kabul, Afghanistan (CNN) -- Two service members with the NATO-led International Security Assistance Force were killed in a roadside bomb attack in southern Afghanistan on Friday. The deaths add to a growing list of troop casualties this week.
As per policy, the coalition did not release the nationalities of the service members who died.
At least 18 American troops have been killed in Afghanistan in the past week, along with eight coalition troops from the United Kingdom, Australia, Canada and France, according to CNN records.
Meanwhile, two service members were wounded in a suicide attack Friday on a NATO convoy in Zabul province -- also in southern Afghanistan, said Jhalam Jelali, the provincial police chief.
The Zabul attack killed two civilians and wounded 13 all together. In addition to the NATO troops, the injured also included two Afghan police officers, Jelali said.