Incident follows clashes between security forces, protester on anniversary of uprising
Bahrain said on Thursday a security official had been killed in a "terrorist attack" using what it said was an inflammable projectile, according to a statement from the Interior Ministry on its Twitter account.
The incident late on Thursday followed clashes between security forces and demonstrators on the second anniversary of the uprising by majority Shi'ite Muslims, demanding democratic reform.
Earlier, it was reported that a Bahraini teenager was killed by security forces on Thursday, an opposition website reported, as activists demonstrated on the second anniversary of an uprising demanding democratic reforms in the US-allied Gulf Arab state.
The protests could mar reconciliation talks that began on Sunday between mostly Shi'ite Muslim opposition groups and the Sunni-dominated government to try to end two years of political deadlock in the island kingdom, which is home to the US Fifth Fleet.
Mass protests that erupted in the island state in February 2011 at the height of the Arab Spring were crushed, but small demonstrations continue on an almost daily basis demanding greater rights for Bahrain's Shi'ite majority and an end to the absolute power of the Sunni ruling family.
The website of the main opposition group Wefaq said a young man identified as Ali Ahmed Ibrahim al-Jazeeri had died in the village of Diya near Manama in an area mostly inhabited by Shi'ites. It said Jazeeri, born in 1996, had been shot by security forces using exploding bullets, banned internationally.
Dozens of people were also hurt in the violence, some by tear gas and other more seriously, it said.