The Monday attack comes as protesters have demanded an end to the Al Khalifa regime, complaining about injustice and discrimination.
There is no report on the number of casualties in the attack.
Saudi Arabia and the United Arab Emirates deployed their first batch of military forces in Bahrain in mid-March.
Late last month, Saudi Arabia increased the number of it forces in Bahrain in an attempt to further help the ruling regime clamp down on anti-regime demonstrators.
Amnesty International has criticized the Al Khalifa regime for its violations of international law by brutally cracking down on peaceful protesters and activists.
Anti-regime protesters have been holding demonstrations across the country since mid-February, calling on the ruling family to relinquish power.
(www.presstv.ir / 01.08.2011)