KABUL (Reuters) - A roadside bomb killed three members of NATO's International Security Assistance Force (ISAF) in southern Afghanistan on Tuesday, the coalition said.

It is ISAF policy not to identify the nationality of soldiers killed on duty.

The Taliban on Sunday launched its spring offensive, saying it would take aim at foreign military bases and diplomatic areas.

(Reporting by Amie Ferris-Rotman; Editing by Janet Lawrence)