Bahrain says a city hall was set ablaze during a night of clashes between police and protesters following the execution of three men convicted of a deadly bombing targeting police.

Bahrain's Interior Ministry said Monday the blaze at the Northern City Hall appeared intentional. It said firefighters were able to contain it.

Hundreds protested Sunday over the three Shiite men put to death by firing squad over the 2014 bombing that killed two Bahraini policemen and an Emirati officer.

Opponents of Bahrain's Sunni-ruled kingdom saw the men's charges as politically motivated and alleged the men were tortured.

Some youth threw gasoline bombs and clashed with police into the night Sunday. Police fired tear gas and birdshot.

Bahrain hosts the U.S. Navy's 5th Fleet and an under-construction British naval base.