Opposition parties called on Saturday for staging protests at Egypt's High Court to demand the release of detained political activists and lawyers who were captured in Alexandria's clashes on Friday.

Protesters opposing President Mohamed Mursi and the Muslim Brotherhood in Alexandria clashed on Friday with unknown assailants after the latter attacked the protesters' march leaving scores of people injured.

Security forces arrested 15 protesters outside Alexandria's Raml Police station. Allegedly, the lawyers who went to offer legal aid to the captured protesters were also detained and assaulted.

Alexandria's East prosecution charged the detained activists of damaging and attempting to storm the Raml Police Station and assaulting police officers.

The Popular Socialist Alliance Party and the Liberal Egyptians Party called on their Facebook pages for staging the protests at five pm in solidarity with the assaulted protesters against "fabricated charges".