BAGHDAD, Iraq — Insurgents loyal to radical Shiite cleric Muqtada al-Sadr battled fiercely with U.S. and Iraqi forces in the holy city of Najaf on Thursday in fighting that killed one U.S. soldier, seven Iraqi civilians and seven militants. A U.S. helicopter was shot down.
Bloodshed quickly spread to other Shiite areas, with each side blaming the other in a profound threat to a shaky two-month-old truce. Al-Sadr's men also fought with U.S. troops in the Baghdad neighborhood of Sadr City, wounding seven Americans; shot at government offices in the southern city of Amarah; and clashed with British forces in Basra, where one militant was killed.
"The cease-fire is over because of the actions of the occupation forces, and the situation has started to deteriorate," warned Sheik Abdul Hadi al-Daraji, a spokesman for al-Sadr in Baghdad.
During the fighting in Najaf, a U.S. UH-1 helicopter was hit by gunfire and crashed, injuring the crew, and Iraqis said at least seven militants and seven civilians had been killed and 54 wounded. The U.S. command said insurgents attacked a U.S. convoy near Najaf, killing one American soldier and wounding five.
Also Thursday, a suicide car bombing at a police station south of Baghdad killed five people and wounded 27, the Interior Ministry said.
The fighting was the worst flare-up between authorities and al-Sadr's forces since a series of truces two months ago ended weeks of violence that began after the U.S.-led occupation authority closed al-Sadr's newspaper and arrested a key aide. The newspaper was recently allowed to start printing again, but tensions had been rising in recent days between al-Sadr's Mahdi Army and Iraqi and U.S. forces.
People in Najaf said al-Sadr loyalists attacked a police station with mortars, rocket-propelled grenades and gunfire early Thursday. U.S. Marines later moved into the area, and busloads of Mahdi Army militants were seen entering the city, residents said.
The Marines intervened "to help the policemen protect the police stations and the city," Najaf Gov. Adnan al-Zurufi told the Al-Jazeera television station. He warned of "very bad consequences" if the militiamen did not disarm and leave the holy city.
The fighting killed seven militants and wounded 22, who were captured, the U.S. military said. Seven civilians also were killed and 32 injured, including four policemen, said Youssef Monem, an official at the city's al-Hakeem hospital.
The U.S. command said insurgents attacked the U.S. military convoy outside Najaf with gunfire and a rocket-propelled grenade, killing one American soldier and wounding five. The slain soldier's name was not released.
People in Najaf reported the fighting had caused slight damage to the dome of the Imam Ali Shrine, a revered mosque that is reputed to hold the remains of Imam Ali, the most hallowed saint in Shia Islam. The shrine also sustained minor damage twice during fighting in May. U.S. forces have been careful to avoid damage to shrines in Najaf and other holy cities for fear of angering Iraq's Shiite majority.
In Baghdad's Sadr City neighborhood, insurgents fired on a U.S. patrol, triggering gunbattles, said Maj. Philip Smith, a spokesman for the U.S. Army's 1st Cavalry Division. Seven U.S. soldiers were wounded in at least two firefights, Smith said.
Al-Daraji, al-Sadr's spokesman, said the fighting broke out in Baghdad because of the violence in Najaf and escalating tensions between U.S. forces and al-Sadr's loyalists throughout the country.
In Amarah, an appeal for Mahdi Army members to mobilize rang out from mosque loudspeakers and militants took to the streets, shooting at government buildings and blocking roads, residents reported.
An al-Sadr militant was killed and three were wounded after they ambushed a British patrol in the southern city of Basra, said a local al-Sadr official, As'ad al-Basri. There were no immediate reports of British casualties.
The Mahdi Army earlier had said it was taking up positions close to where British troops normally patrol after a noon deadline passed in its demand for the release of four al-Sadr supporters detained two days earlier.
The British had not received a formal ultimatum, "only rhetoric," said a British spokesman, Maj. Ian Clooney. He said the men in custody had been detained for questioning.
An al-Sadr spokesman, Sheikh Assad al-Basri, said the militant group "prepared 1,000 fighters in Basra to confront the British forces who failed to respond to our demands."
Meanwhile, in Mahawil, 50 miles south of Baghdad, a pair of gunmen dressed in police uniforms opened fire on guards outside a police station while a third sped toward the station in a vehicle filled with explosives and blew up, killing five people and wounding 27, the Interior Ministry said.
The blast damaged the gate of the station and a dozen nearby cars and left a 15-foot-wide crater.
"I was outside the building when I saw a car heading toward us. We started shooting. I'm sure we shot him but he managed to explode the car," said police Capt. Adel Omran, whose leg was hit by shrapnel.
The two gunmen escaped, said Sabah Kadhim, an Interior Ministry spokesman.
"What do these criminals want from Iraqis? They sometimes target the Sunnis, the Shiites and the Christians and other times they target the police and the army. They, however, do nothing to the Americans," said Zayd Hadi, a civilian who was outside the station and suffered wounds to his face and stomach.
Near the town of Samarra north of Baghdad, the U.S. military said it staged a series of raids on suspected insurgents and detained nine people. Operation Cajun Mousetrap II began early Thursday morning, targeting groups suspected of planning and financing attacks on Iraqis and coalition forces, the military said.