MANAMA, Bahrain - Military troops and security forces opened a large-scale assault today against hundreds of anti-government protesters occupying a landmark square in Bahrain's capital, a day after emergency rule was imposed and clashes erupted in the violence-racked Gulf kingdom.
Police and military units fired tear gas as they pushed into Pearl Square, which has been the center of the uprising against Bahrain's rulers since it began more than a month ago. Shooting was heard as the attack was launched shortly after daybreak, but there was no immediate word on casualties. Black smoke was seen rising from the square.
It was unclear whether the offensive included soldiers from other Gulf nations who were dispatched to help Bahrain's Sunni monarchy, which has been under relentless pressure from the country's majority Shiite Muslims to give up its monopoly on power.
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Helicopters crisscrossed over the square, which was cleared by security forces late last month but was later retaken by protesters after a deadly confrontation with army units.
Protesters fled today for cover into side streets. For Bahrain's authorities, clearing Pearl Square would be more of a symbolic blow against protesters than a strategic victory. Opposition groups were still be able to mobilize marches and other actions against the leadership.
On Tuesday, Bahrain's king declared a three-month state of emergency and instructed the military to battle unrest in the strategic nation, which hosts the U.S. Navy's 5th Fleet. Shortly after the announcement, clashes erupted across the island nation, killing at least two civilians. Saudi officials also said one of its soldiers was killed.
Bahrain's sectarian clash is increasingly viewed as an extension of the region's rivalries between the Gulf Arab leaders and Shiite powerhouse Iran. Washington, too, is pulled deeply into the Bahrain's conflict because of its key naval base - the Pentagon's main Gulf counterweight to Iran's growing military ambitions.
On Tuesday, Iran and its allied force in Lebanon, Hezbollah, denounced the presence of foreign soldiers in Bahrain. Iran has no direct political links with Bahrain's main Shiite groups, but Iranian hard-liners in the past have called the tiny island nation the "14th Province" of the Islamic Republic.
Gulf rulers, particularly Saudi Arabia, fear that the collapse of Bahrain's Sunni monarchy could embolden further revolts across the region and embolden the Saudi Shiite minority whose home region is connected to Bahrain by a causeway.
On Tuesday, Secretary of State Hillary Rodham Clinton expressed alarm over "provocative acts and sectarian violence," and said she telephoned Saudi Foreign Minister Prince Saud to stress the need for the foreign forces to promote dialogue.

