Police raided on Thursday a factory for making explosive devices in Sharqia.
Earlier, a powerful explosion was heard inside a plastic factory on Bilbeis-10th of Ramadan highway.
Explosive experts rushed to the place of the factory along with a squad of special forces.
The forces found huge amounts of chemical and flammable materials, circuits and small detonators.
Two people were spotted fleeing the place as forces were arriving at the factory.