An explosion took place at the North Giza Court early Tuesday according to Al-Ahram Arabic website, an hour before voting in a referendum on Egypt's amended constitution begins.

The court is located in Imbaba, a district of Greater Cairo.

The façade of the court was destroyed, according to Ahram Online reporter.

Egypt’s Ministry of Interior has released a statement confirming that the explosion has not caused any injuries.

Two hours after the explosion, the Nearby polling station located 250 metres away from the explosion, at Al-Shahid Gawad Hosni School, had a queue of hundreds of voters waiting outside.

Al-Shahid Gawad Hosni School polling station located 250 metres away from the Giza court, hundreds of voters waiting outside (Photo: Ahram Online)

Egypt has seen a number of bomb attacks since the ouster of Mohamed Morsi last July. Most have been in Sinai, but a blast on 24 December outside a police building in the Nile Delta city of Mansoura killed 16 people. The authorities have linked the violence to the Muslim Brotherhood, although the group denies any connection.

The 2012 constitution was amended as part of the 3 July roadmap, which included the ouster of Morsi, amending the Islamist drafted constitution–which opposition slammed for not being representative–as well as fresh parliamentary and presidential elections to follow the constitutional referendum.