Police Forces Storm Bahrain Protest Camps Leaving At Least 4 Dead

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WATCH ABC News Reporter Attacked in Bahrain

Political unrest continued to spread across the Arab world as tens of thousands of protesters flooded Bahrain's Pearl Square and riot police responded with tear gas and rubber bullets, leaving at least five people dead and wounding hundreds more.

The crackdown on anti-government rallies early Thursday morning local time led to the dismantling of protest camps set up at Pearl Square after the Interior Ministry "declared the camp illegal" and warned citizens to "stay off the streets," the Associated Press reported.

It marked the first time armored vehicles were seen in the streets after the pre-dawn raid and "effectively shut down the island nation" as workers located at the capital were not allowed to pass checkpoints.

This morning, ABC News has learned that Secretary of State Hillary Clinton and other senior officials will be calling their Bahraini counterparts today to urge restraint and to advise this U.S. ally on how best to proceed.

Bahrain, a small, but strategic nation located in the Persian Gulf is crucial in the U.S. fight against Al-Qaeda. It is also the home to the 5th Fleet - a major U.S. Naval Forces Central Command.

ABC News correspondent Miguel Marquez was caught in the crowd, and beaten by men with billy clubs in Bahrain's capital, Manama.

The country's main opposition group, Al Wefaq, said two men were killed in Pearl Square. Hospitals across the city were on alert for more casualties.

A member of parliament later told Marquez a total of four people were killed, two of them with a shotgun.

ABC News Correspondent Miguel Marquez Injured

Marquez said he was not badly injured, but he was hit several times and his camera was pulled from his hands while he yelled, "Journalist, journalist!" -- trying to show he was not a protester.

Marquez was on the phone to ABC News in New York when the attack happened.

Click HERE or on video in upper left to listen to Marquez's report.

"There was a canister that looked like -- No! No! No! Hey! I'm a journalist here!" he yelled. "I'm going! I'm going! I'm going! I'm going! ... I'm hit.

"I just got beat rather badly by a gang of thugs," Marquez said later. "I'm now in a marketplace near our hotel where people are cowering in buildings."

He paused.

"I mean, these people are not screwing around," he added. "They're going to clear that square, tonight, ahead of any protest on Friday. The government clearly does not want this to get any bigger."

In the spreading unrest in the Middle East, several Western journalists have been attacked.

CBS News correspondent Lara Logan was beaten and sexually assaulted in Cairo on the night Hosni Mubarak stepped down as president of Egypt, according to CBS. She returned to the United States, was hospitalized and now has returned to her home.

The White House said President Obama called Logan Wednesday.

Earlier, ABC News' Christiane Amanpour and CNN's Anderson Cooper found themselves targeted by angry crowds in Cairo.

Fox News reporter Greg Palkot and cameraman Olaf Wiig were detained, blindfolded and beaten by Egyptian military police.

ABC News cameraman Akram Abi-Hanna, producer Brian Hartman, and two colleagues were carjacked and threatened with beheading.

Bahrain Is Latest Flashpoint

After his incident, Marquez was able to put together a brief report from Bahrain:

"Pearl Square in downtown Manama: Tonight, it has become the center of a growing and increasingly organized protest," he said. "There appear to be tens of thousands of protesters here. Keep in mind that this is a country of less than a million people.

"The protests began Monday in mainly Shia Muslim areas on the outskirts of the city," he said. "At the time, the protesters wanted more work and opportunities from the Sunni-dominated government.

"But after two protesters were killed, the crowds and demands have grown stronger and bigger."

Protesters Demand Jobs, Release of Political Prisoners

Protesters in Bahrain are demanding not just jobs but also the release of political prisoners, broad constitutional reforms and an end to the monarchy that has ruled Bahrain for 200 years.

King Hamad al Khalifa went on television to call for an investigation into the deaths and ordered police to back off.

"The result," said Marquez, "[is] thousands of protesters who say they won't leave the square until they get what they want.

"On Friday, there is a call for an even bigger demonstration. Organizers expect tens of thousands -- maybe more than 100,000 people to show up. At this point, this protest is only growing stronger."

ABC News' Jake Tapper, Emily Schmidt, Kirit Radia and the Associated Press contributed to this report.