Bahrain has stripped the spiritual leader of the kingdom's Shia majority of his citizenship, state news agency BNA reported on Monday, and there were reports of a protest outside his house.
Saudi Arabia's execution of a leading cleric from the Shia community has threatened to further intensify a wave of sectarian conflict in the region.
Iran's foreign ministry spokesman accused Saudi Arabia on Saturday of supporting terrorism and executing its opponents, after Saudi Arabia executed Nimr al-Nimr, a prominent Shia cleric.
Saudi Arabia executed 47 people on Saturday for terrorism it said, an apparent message to both Sunni Muslim jihadists and Shia anti-government protesters that the kingdom will brook no violent dissent.