CAIRO, Dec 20 (Aswat Masriya) - Supporters of the Muslim Brotherhood torched a police vehicle in Cairo's Mohandessin after clashing with security forces on Friday, the state-run Middle East News Agency reported.

The police fired teargas bombs to disperse the protesters, the agency stated.

Clashes erupted earlier today between a march for the Brotherhood supporters and security forces in Ahmed Orabi Street.

Some area residents and shop owners hurled stones at the march to steer the protesters away from their homes and shops.

The National Coalition for Supporting Legitimacy has called for new demonstrations on Friday to urge people to boycott the constitutional referendum set to take place in mid-January.