Story highlights

4 were killed in one incident and 1 was killed in a separate incident

3 coalition troops were killed on Thursday

(CNN) —  

At least five coalition troops were killed in southern Afghanistan Friday, NATO’s International Security Assistance Force said.

Four troops died after a bomb exploded and in a separate incident one service member died after an insurgent attack.

There were no other details given about the incidents.

The deaths come a day after three other coalition service members died after a bomb explosion in southern Afghanistan, ISAF said.