A series of explosions have rocked the Nile Delta city of Sharqiya on Wednesday, injuring two people and damaging a number of electrical transmission units, Aswat Masriya news website reported.

Six bombs went off in different spots next to a police station, parking garage, an ATM and a drinking water pipeline.

Two local residents were injured as they passed by, while four electrical transmission units were damaged, cutting off electricity in the area.

Explosives experts searched the area for other possible devices.

Dozens of explosive devices went off or were diffused by police around Egypt on the anniversary of 25 January revolution and the days that followed.

The country has been battling a growing insurgency that targets its security forces in Sinai, the capital and the Nile Delta cities.

Attacks have spiked in the year and a half that followed the ouster of Islamist president Mohamed Morsi, with recent smaller bombs in civilian areas.