STEVE INSKEEP, host:
Today, the U.S. accused Iran of assisting attacks on American soldiers. The U.S. recently arrested Iranian agents inside Iraq. In an interview with NPR, Under Secretary of State Nicholas Burns contended those Iranians played an active role.
Mr. NICHOLAS BURNS (U.S. Under Secretary of State): We have picked up individuals who we believe are giving very sophisticated explosive technology to insurgent groups, who are then using that technology to target and kill American soldiers. It's a very serious situation.
INSKEEP: Various news reports suggest Iranians helped to kill five Americans in Karbala, Iraq, this month. But Nicholas Burns only says that's under investigation. You can hear more of that interview tomorrow on MORNING EDITION from NPR News.