MANAMA, Bahrain (AP) — Riot police officers in Bahrain fired tear gas and stun grenades on Saturday in clashes with protesters who broke away from a funeral procession for a 17-year-old boy killed the day before during street battles with the security forces.

Thousands of mourners took part in the funeral march, chanting antigovernment slogans and waving Bahraini flags. Later, smaller groups of several hundred demonstrators broke away and hurled stones at police units. There were no immediate reports of injuries.

The death of the boy late Friday could stir more tensions between the forces backing the Sunni-led monarchy and groups from Bahrain’s Shiite majority who are seeking a greater voice in the country’s political affairs.

More than 50 people have died, including protesters and police officers, in almost 20 months of political turmoil in Bahrain, an island nation in the Persian Gulf and the headquarters of the United States Navy’s Fifth Fleet.