NATO says that two service members have been killed in separate attacks in southern Afghanistan, while two others have died of non-battle injuries. The coalition said in statements that one service member was killed by an improvised explosive device Wednesday and another by a similar weapon on Tuesday. NATO said the two other service members died of non-battle injuries, one in the south on Wednesday and another in the east on Tuesday. The US-led coalition did not provide their nationalities nor disclose other details. So far this month, 31 coalition members have died in Afghanistan, bringing the year's toll to 122.