Three NATO troops have been killed in southern Afghanistan in landmine attacks. Two soldiers died on Sunday in roadside bomb attacks, NATO statements said. The third soldier was killed the same day by another landmine explosion in the same region, the military alliance said. A spokesman for the NATO-led International Security Assistance Force did not give the exact locations where the casualties occurred. The latest death raises the number of international troops killed in September to 27. A total of 432 members of the international military coalition have died so far this year.