Explosion rocks university in Cairo, injures 5

(CNN) -- Five people were wounded Thursday in an explosion near Al-Azhar University in Cairo's Nasr City neighborhood, according to local media reports.

A bomb disposal team defused a second bomb, al-Masriya state TV reported.

The Nasr City neighborhood is a traditional stronghold of supporters of deposed Egyptian President Mohamed Morsy of the Muslim Brotherhood.

Egypt's interim government officially has declared the Muslim Brotherhood a terrorist organization, blaming it for a recent bombing despite the fact a different organization claimed responsibility for the attack.

The United States objected to the government's assault on the Muslim Brotherhood's reputation.

Thursday's blast comes in the lead-up to Egypt's referendum on a new constitution, which will be held January 14-15.

If passed, the constitution would ban religious parties and put more power in the hands of the military.