Anti-government activists in Bahrain say police have fired tear gas and stun grenades to disperse hundreds of protesters in the Gulf kingdom’s capital, Manama.

There were no immediate reports of injuries in Friday’s clashes. Other demonstrations later sprung up in parts of the Gulf kingdom.

The protests were the latest attempt by demonstrators to confront security forces in the capital, which was the hub of an uprising nearly two years ago.

Bahrain’s majority Shiites have been seeking a greater political voice in the Sunni-ruled country, which is the home to the U.S. Navy’s 5th Fleet. More than 55 people have been killed in the unrest.