Bahraini security forces have fired tear gas to clear out pro-democracy demonstrators camped out at the main square in the capital, Manama.
The move by security forces Wednesday comes a day after street battles between police and activists killed at least two people and wounded hundreds of others.
The government has declared a state of emergency to try to end the uprising.
Medical officials say police killed one man in the town of Sitra, while the government says a member of the security forces was run over and killed by a protester driving a car in another area.
Bahraini state television said Tuesday King Hamad bin Isa al-Khalifa ordered the commander of the armed forces to take "appropriate measures" to safeguard the nation against protesters whom he accused of "terrorizing" the population.
The king gave permission Monday for about 1,000 Saudi soldiers and 500 United Arab Emirates police to protect Bahraini government buildings.
Thousands of protesters marched outside the Saudi embassy in Manama, calling the military presence an "occupation."
In Cairo, U.S. Secretary of State Hillary Clinton said she telephoned Saudi Foreign Minister Prince Saud al-Faisal to urge him to push for a dialogue in Bahrain. Clinton said a credible political settlement is the only durable solution.
Protesters from Bahrain's majority Shi'ite population have been demanding political reforms from the minority Sunni government.
The ruling al-Khalifa family has offered to hold a dialogue with opposition groups. But some protesters are demanding more power for parliament and that the royal family be ousted.
Some information for this report was provided by AP, AFP and Reuters.