Deadly day for American forces - Mar 12th, 2013 - National

— A helicopter crash in southern Afghanistan has killed five US troops.

The crash near Kandahar city is under investigation, but NATO says "initial reports" show there was no enemy action in the area at the time.

The nighttime crash brings the total number of U.S. troops killed Monday to seven, making it the deadliest day for American forces so far this year.

Earlier in the day two U.S. special operations forces were gunned down in an insider attack by an Afghan policeman in eastern Afghanistan.