The prime minister will be questioned at the residence today, while his wife, Sara Netanyahu, will also be questioned separately, at a different location, according to media reports.
Eli Kamir, another former Netanyahu adviser arrested last week, was on Wednesday released from police custody but placed under house arrest.
The controlling shareholder of Bezeq Telecom, Shaul Elovitch, is now in police custody, along with a former Netanyahu spokesman.They deny any wrongdoing.
Meanwhile, about 70 protesters gathered outside Netanyahu's residence, demanding his resignation.
It is the first time that Netanyahu has been investigated in connection with this case, which is said to involve a quid pro quo arrangement of positive news coverage for the Netanyahu family on the popular Walla news website, owned by Bezeq's majority shareholder, Shaul Elovitch.
This, said the TV channel, turns Sara Netanyahu into a suspect in the case.
The Associated Press, alongside other agency cameras, caught detectives arriving in two vehicles around 9 a.m., but there has been no official police statement on the ongoing investigation.
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Shannon handled 20 flight diversions alone from Dublin and Cork Airports starting from 04.20 on Wednesday morning until midnight. Homeless shelters have prepared emergency transport to the welfare centre in Luton should their own facilities reach capacity.
Filber, a Netanyahu ally for more than 20 years and a former communications ministry director general, is expected be a state witness in exchange for avoiding jail.
Some drivers touted their horns in support as they drove by. He calls the allegations against him a "witch hunt" and has said he will seek a fifth term in an election due in late 2019. That decision could be weeks or months away.
In Case 1000, Netanyahu and his wife are suspected of receiving illicit gifts from billionaire benefactors, amounting to some NIS 1 million ($282,000) worth of cigars and champagne from the Israeli-born Hollywood producer Arnon Milchan and Australian resort owner James Packer in return for certain benefits. In return, police say Mr. Netanyahu operated on Mr. Milchan's behalf on USA visa matters, legislated a tax break and connected him with an Indian businessman.
In return, Walla, a news site controlled by Elovitch, allegedly refrained from criticizing Netanyahu and gave him and his wife, Sara Netanyahu, positive coverage.
Case 2000, said police, involved deals made between Netanyahu and Arnon Mozes, publisher of the popular Israeli daily Yedioth Ahronoth.
As it stands, PM's governing coalition partners stand by him, and await attorney-general's next steps. Political analysts say this may change whether the investigations against Netanyahu intensify.