Netanyahu has denied any wrongdoing, dismissing the accusations as a media witch hunt.
Now at the center of three corruption probes, Netanyahu denies any wrong doing calling the allegation against him a 'witch-hunt'.
Israeli Prime Minister Benjamin Netanyahu attends the weekly cabinet meeting at the Prime Minister's office in Jerusalem February 25, 2018.
The development comes ahead of the prime minister's visit to Washington where he is to meet with President Donald Trump and speak before the pro-Israel lobby AIPAC next week.
Investigators were at the same time to take a statement from his wife Sara at national fraud squad headquarters near Tel Aviv, media said.
This, said the TV channel, turns Sara Netanyahu into a suspect in the case. They are both possible criminal suspects in the case.
A representative for Mr Elovitch had no immediate comment and Mr Hefetz's lawyer did not respond to a request for comment.
From granting favours for fine champagne to attempting to bribe a judge - a series of allegations have entangled Israeli Prime Minister Benjamin Netanyahu in recent months.More news: Celtic boss on shortlist to replace Arsene Wenger
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.
There were a few dozen protesters, singing songs and banging plastic pipes on garbage cans.
Some drivers touted their horns in support as they drove by.
"A prime minister under investigation can not, and may not, take crucial decisions", said Shuki Cohen, 63, an economist from Moshav Arugot.
He's stated that he will seek a fifth term in a nationwide election due in late 2019.
Police believe that Mr Netanyahu directed his aides to intervene on behalf...
According to the police recommendation, Case 1000 involves gifts of cigars and jewelry that the prime minister and his wife are suspected of receiving from billionaire benefactors such as Israeli-born Hollywood producer Arnon Milchan and Australian business executive James Packer. In return, police say Netanyahu operated on Milchan's behalf on US visa matters, legislated a tax break and connected him with an Indian businessman. During that time, Walla's coverage notably changed to favor the Netanyahu family, and Bezeq was given permission, among other things, to buy the satellite cable provider Yes, overriding antitrust issues, and to renege on its commitment to lease out its infrastructure to telecom competitors so they could provide competing fixed line and internet services.