(KUNA) -- Moroccan security forces arrested on Tuesday members of an unlicensed political group, the Islamic Moroccan liberation party (Hizb-ut-Tahrir Al-Islami Al-Maghrebi). An official source said 13 persons belonging to the party were apprehended under the supervision of the attorney-general's office. The arrest took place in the cities of Meknes, Casablanca and Tetouan, he said.