Martyrs' families broke down after 13 policemen and a lower-ranking officer were acquitted by a Giza court Wednesday, of killing peaceful protesters in the Cairo suburb during last year's 28 January "Friday of Rage" demonstrations.

The defendants were accused of killing six civilians and of firing live ammunition against another 18 in front of Kerdasa, Haram and El-Giza's police stations at the peaceful protests demanding the overthrow of Mubarak's regime.

The verdict was received with screams from the families of the slain protesters who vowed to take revenge with their own hands.

More than 840 protesters were killed during the 18-day uprising that led to the ouster of president Hosni Mubarak while more than 6,000 others were injured.