2 US Troops Killed by Roadside Bomb in Afghanistan

U.S. military veterans set up 1,892 American flags on the National Mall in Washington on March 27, 2014. The Iraq and Afghanistan Veterans of America installed the flags to represent the 1,892 veterans and service members who committed suicide that year as part of the "We've Got Your Back: IAVA's Campaign to Combat Suicide." Win McNamee/Getty Images

KABUL, Afghanistan—Two U.S. service members were killed and two others injured when their vehicle was hit by a roadside bomb in southern Afghanistan, the U.S. military said in a statement on Saturday.

In keeping with defense department rules, the U.S. military did not identify the service members.