Armed militants attacked the headquarters of Yemen’s intelligence services on Saturday, killing three guards and injuring eight others, witnesses said.

The militants opened fire on guards as they stormed the Political Security Agency compound in the Tawahi in the port city of Aden, according to the witnesses.

Three guards were killed and eight others injured, police sources told the German Press Agency dpa. The militants are believed to belong to the al—Qaeda terrorist network.

Residents of adjacent houses said the militants had fired rocket— propelled grenades and detonated hand grenades.

The attack appeared to be a bid to free detainees.

The compound houses high—security jail in which suspected members of al—Qaeda and members of the Yemen’s separatist Southern Movement are incarcerated.

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