Egypt's top prosecutor has ordered on Tuesday enforcing a no-parking zone in front of Cairo's High Court, where his office is located, a day after a blast in front of the building killed two civilians, judicial sources said.

General Prosecutor Hisham Barakat sent the written order to the force assigned with securing the High Court and to the capital's security headquarters to stop vehicles from parking within the vicinity of the court.

The deceased in Monday's explosion succumbed to their injuries hours after the blast. Nine others, mostly policemen, were injured and three cars were damaged.

Later on the same day, two small bombs hit separate spots in the capital, with no casualties. 

On Tuesday, five improvised bombs exploded in Cairo's Matariya district in an apparent targeting of mobile-phones stores Vodafone and Mobinil.

The bombings, which caused no casualties, damaged ten private cars and seven shop facades on Matariya's main street.

Egypt has been fighting a growing militant insurgency nationwide, with the deadliest attacks targeting security forces and state installations, predominately in north Sinai.

The assaults spiked after the ouster of Islamist president Mohamed Morsi in 2013 and spread to the capital, Nile Delta cities and elsewhere, after being initially centred in Sinai.