unlawful armed groups(не рекомендуется для перевода на английский) Thousands of protesters demonstrated in Libya's capital on Friday to call on unlawful armed groups to leave the city 4uzhoj)
unlawful armed groups(в гугле крайне мало кошерных английских источников, содержащих это выражение) (The Evening Standard): Thousands of protesters demonstrated in Libya's capital on Friday to call on unlawful armed groups to leave the city.4uzhoj)
illegally armed militia groups(The statement said "an illegally armed militia group" attacked the building with grenades, small arms and "indirect fire".4uzhoj)