The raid against the residences took place on Saturday.
Also on Saturday, young people took to the streets in several villages near Manama and blocked roads.
People in Bahrain have been staging demonstrations since mid-February 2011.
The protesters initially called for implementation of political reforms and establishment of a constitutional monarchy. The demands later changed to an outright call for the ouster of the ruling Al Khalifa family following its brutal crackdown on peaceful protests.
Scores of people have been killed and many others injured in the Saudi-backed campaign of suppression. Bahrainis hold King Hamad bin Isa Al Khalifa responsible for the deaths and arrests.