(Ahlul Bayt News Agency) - "Ali Hasan al-Dehi, 70, was attacked by riot police forces Wednesday evening" and died early Thursday, Al-Wefaq's website reported.
His son, Hussein al-Dehi, is deputy head of Al-Wefaq.
The statement said the elder Dehi had told one of his sons, who had arrived home to find him on the floor, that "he had been beaten by riot police."
Al-Wefaq member and former MP Sayed Hadi Moussaoui told media sources that police were dispersing a protest in the western village of Dehi, when the man was attacked.
Moussaoui said members of Dehi household were harassed several times by the authorities, adding that the dead man's wife had been "insulted" in the past without giving further details.
Earlier this year, Bahrain's monarchy crushed anti-regime protests, with the help of Peninsula Shield Forces, led by the Saudi Arabia.
Twenty-four people died during the crackdown, between mid-February and mid-March, according to official figures from Manama.
Four protesters have since died in custody.
The Gulf kingdom is awaiting a report by an independent commission of inquiry into the crackdown, which is expected on November 23.
Though mass protests have ended, tensions remain high as the trials of dozens of medics, opposition figures and protesters continue in the capital.
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