Bahraini police is to question key members of the mainly Shi'ite Muslim opposition movement al-Wefaq for what it said were "violations" committed during a pro-democracy rally.

Al-Wefaq said its secretary-general, Sheikh Ali Salman, was among those being questioned and that his house had been surrounded by armed government troops. In 2011, Bahrain stamped out mass pro-democracy demonstrations with the help of the Saudi military. Despite some reconciliation efforts, its Sunni rulers have failed to solve its conflict with the opposition.