Egypt has detained 22 women members of the Muslim Brotherhood, a security official said on Friday, fuelling tensions days before deposed President Mohamed Morsi and 14 other leaders of the Islamist group go on trial.

Security forces have arrested thousands of Islamists since the army toppled Morsi on July 3.

Nasser al-Abd, a senior security official in Egypt's second city Alexandria, said the charges against the women include using force to disrupt traffic during protests, membership of an outlawed group and distributing illegal leaflets.

A lawyer representing the suspects said they were aged between 15 and 25. They were detained on Thursday morning.

Hundreds of Islamists have been killed and the Brotherhood's leaders have been imprisoned. Egypt has also declared a state of emergency and imposed a night-time curfew.

Morsi's supporters have called for daily protests starting on Friday until the ousted president stands trial on Monday.