3 US troops killed by man in Afghan army uniform

KABUL, Afghanistan (AP) - The U.S. military in Afghanistan says three service members have been shot dead by a man in an Afghan army uniform.

Maj. Lori Hodge says the shooting happened Friday morning in the southern province of Helmand. She gave no details and said the military is investigating.

The attack is the third killing this week of coalition soldiers by Afghans who are training to take over responsibility for security once most international forces leave in 2014.