An explosion at an electricity pylon in Egypt's 6 October City on Tuesday led to power cuts at nearby factories, Al-Ahram Arabic reported, hours after bombs at two other pylons located nearby caused a temporary blackout at a media compound known as Egyptian Media Production City.
On Monday night, six improvised bombs detonated at two electricity pylons in 6 October, located four kilometres away from the Egyptian satellite-operation company Nilesat.
The bombing caused a power cut at the nearby Egyptian Media Production City, forcing several TV channels off air. Power has since been restored.
The electricity pylon that was targeted on Tuesday provides power to factories in the satellite city of 6 October, and is around 20 kilometres (12 miles) away from the first two pylons, Al-Ahram Arabic website reported.
However Mohamed Geneidy, the head of 6 October Investors Association, told Al-Ahram that the organisation "has not received any complaints" about power cuts from factory owners.
Egypt has been battling a decade-long militant insurgency in North Sinai that spiked since the ouster of Islamist president Mohamed Morsi in July 2013.
In recent months, dozens of smaller bombs have been planted by militants nationwide, targeting security personnel as well as infrastructure such as electricity pylons and railway stations.