Opposition groups, led by al-Wefaq, have repeatedly called for all protest to be peaceful.

BBC: Dozens injured as violence flares in Bahrain

Earlier this year the leader of Bahrain's main opposition group, al-Wefaq, called for the crown prince to attend talks aimed at ending the unrest.

BBC: Bahrain Crown Prince Salman addresses civil rights

Bahrain's leading opposition party, Al-Wefaq, said Habib suffered a neck fracture, wounds from birdshot, bruises to his hand and leg, and severe burns to his chest and stomach.

CNN: Fresh clashes in Bahrain as protester is buried