An opposition official in Bahrain says a 20-year-old protester died from injuries suffered during clashes with security forces.

The death is the second this month blamed on riot police in the tense Gulf kingdom and could put further pressure on political talks aimed at ending two years of unrest.

Bahrain’s majority Shiites have led an uprising for a greater political voice in the Sunni-ruled nation, home to the U.S. Navy’s 5th Fleet.

Hadi al-Musawi, a spokesman for the Shiite group Al Wefaq, said the protester died early Friday from a head injury sustained Feb. 14 when he was hit with a tear gas canister fired by security forces. Bahraini officials had no immediate comment.

More than 60 people, more according to some activists, have been killed in unrest in Bahrain.