Two Iraqis were killed in fighting between US troops and insurgents as the Americans carried out sweeps around the northern town of Duluiya, considered a hotbed of extremism, medical sources said. A US military spokesman said soldiers had been sealing off neighborhoods and conducting searches for several days and had carried out detentions in the town, 75 kilometers (40 miles) north of Baghdad. "Two Iraqi corpses and six wounded were brought here," said medics at the general hospital in neighboring Balad.