Three other soldiers were wounded in the attack, the military said in a statement.
The soldiers were on a combat patrol Tuesday when they were struck by an explosively formed penetrator, or EFP, the military said in a statement. They had been returning to a U.S. military base after conducting an escort mission, it said.
EFPs fire a slug of molten metal capable of penetrating even the most heavily armored vehicles, and are have been responsible for hundreds of U.S. deaths in Iraq.
The victims' names were withheld pending family notification.
At least 3,874 members of the U.S. military have died since the beginning of the Iraq war in March 2003, according to an Associated Press count.
Russia has been developing an energy module on the basis of the megawatt-class nuclear power plant since 2010. The spaceship needs neither sunlight nor solar batteries
There are legitimate authorities in Donetsk and Luhansk republics now, with which Russia can implement the project of the economic integration of the Donbass
Austria does not intend to expel Russian diplomats because of the spy scandal