One of the security sources said authorities suspect the individuals to be members of Hasm, a group which has claimed several attacks around the Egyptian capital targeting judges and policemen since a year ago.
Investigators had received information about militants travelling from northern Sinai to the capital to prepare for attacks on neighbouring provinces, it added.
At least 26 Egyptian soldiers were killed or wounded on July 7, 2017, in attacks on checkpoints in the Sinai Peninsula.
At least 18 policemen have been killed and three injured on Monday in a terrorist attack claimed by the Islamic State in North Sinai's city of Al-Arish.
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The microchip giant then appealed to the General Court, second only to the European Court of Justice , but lost the case in 2014. The fine of Euro 1.06 billion against Intel was for abuse of its dominant position on the market for computer chips.
Police and military officials said roadside bombs destroyed and set ablaze four armoured vehicles and a fifth one carrying signal jamming equipment.
The assailants, whose identities were not yet known, later opened fire at survivors and commandeered a police pickup truck.
The officials spoke on condition of anonymity because they were not authorised to speak to the media.
Egypt has been fighting a jihadist insurgency and series of terror attacks took place mainly targeting security forces since the army overthrew then-President Mohamed Morsi in 2013.
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Bids are due October 19 and the company said it expects to choose a site sometime next year. The Seattle campus is spread across 33 buildings and employs more than 40,000 people.
Egypt's military and security forces have been battling various Islamist militant groups, mostly in North Sinai, though militants have carried out attacks elsewhere in the country.
The duel raids also led to the injury of three police officers, three conscripts from the Central Security Forces, in addition to the injury of an officer from the National Security Agency and another two police personnel.
Egyptian police on Sunday raided two adjacent apartments used as hideouts by members of a splinter faction of the outlawed Muslim Brotherhood group, killing 10 of them in a shootout, according to security officials.
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A White House official said Trump would continue to receive regular updates on Hurricanes Irma and Jose. One of the most powerful storms Hurricane Irma is expected to brutalize Florida's southern archipelago.