Scores of judges overseeing the vote counting at polling stations in Giza’s Kerdasa district fled as supporters of deposed president Mohamed Morsi gathered in the area. 

According to Al-Ahram Arabic news website, Morsi loyalists protesting against the constitution referendum set tyres on fire in front of several polling stations.

Police and army forces managed to safely remove the judges and ballot boxes from the besieged stations.

The town of Kerdasa, located south of Greater Cairo, was reportedly taken over by Islamist militants in August following an RPG attack on its police station that killed around 11 policemen. The attack occurred in the period of political turmoil after the dispersal of a major pro-Morsi protest in northeast Cairo. Police forces entered Kerdasa a month later and restored security.

Earlier on Wednesday, an unknown armed group fired at a polling station in Nahiya district in Kirdasa, shortly after vote-counting for the constitution referendum began.

The glass facades of two polling stations were destroyed in the attack, which came amid clashes between supporters of deposed president Mohamed Morsi and security forces, according to Al-Ahram's Arabic news website.

At least two were killed in Nahiya on Tuesday during clashes between police and Morsi loyalists.

Families of those killed then attempted to raid the polling station on Wednesday, reported Al-Ahram.

Around five polling stations in Nahyia were closed for hours on Tuesday, citing security reasons.

Nationwide polling stations closed their ballot boxes at 9 pm, and vote counting began right after. The official results of the constitution referendum should be released early Thursday.

The constitutional poll took place on Tuesday and Wednesday, 14 and 15 January.

At least nine were killed on Tuesday in nationwide clashes between Muslim Brotherhood members, local residents and security forces.

The new constitution, if approved, will replace the Islamist-drafted 2012 charter.

According to the post-June 30 political roadmap, a successful referendum will be followed by parliamentary and presidential elections within the next six months.