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BAGHDAD, March 11 (Reuters) - A roadside bomb killed three U.S. soldiers and an interpreter in the Iraqi province of Diyala, the U.S. military said on Tuesday, a day after a suicide bomber killed five U.S. soldiers in Baghdad.

The attack occurred on Monday, the military said in a statement.

Ethnically and religiously mixed Diyala is one of four provinces north of Baghdad where U.S. and Iraqi forces have launched offensives this year after al Qaeda militants regrouped in the north.

The deaths took to 3,982 the number of U.S. troops killed in Iraq since the U.S.-led invasion in March 2003. Ten soldiers have been killed this month, compared to 81 in the whole of March 2007.

(Reporting by Mohammed Abbas)

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