A policeman has died after being injured in a bomb attack in Bahrain.

The blast happened during protests marking the third anniversary of the country’s uprising on Friday when demonstrators attempted to reach the site of a brutal crackdown almost three years ago.

The policeman was one of two officers wounded in the village of Dair close to the capital in an explosion described by the interior ministry as a “terror blast.” The ministry added that a parked car was set on fire with Molotov cocktails and a police bus damaged in the incident.

The majority Shia community says it wants democratic reform and an end to what it sees as discrimination from the minority Sunni monarchy.

The 2011 uprising was put down by the government with help from troops from Saudi Arabia.

The Interior Ministry said that security officers would be sent to some regions over the next few days “to ensure people’s safety.”