U.S. and Iraqi forces surrounded the town of Duluiya north of the capital, Baghdad, overnight, raiding homes and arresting dozens of suspected insurgents, Iraqi National Guards said on Tuesday. U.S. helicopters struck surrounding orchards where suspected insurgents were believed to be hiding out, witnesses said. There was no immediate word on casualties or comment from U.S. forces. Duluiya lies about 20 kilometres (12 miles) south of Samarra, where U.S. forces carried out an offensive earlier this month to root out rebels ahead of elections planned for January.