Israeli authorities questioned Prime Minister Benjamin Netanyahu on Friday for the first time in a corruption case which involves the nation's biggest telecommunications company Bezeq, Israel Radio said.
Netanyahu and his wife Sara were both questioned by the police Friday, with media reporting it was related to so-called Case 4000, also an alleged attempt to seek positive media coverage through favours.
Earlier in the week, the news outlet published a text message sent by Sara Netanyahu to Iris Elovitch, blasting coverage of the Netanyahus on Walla and urging her to "quickly" change it.
Police have not said whether Netanyahu was questioned in Case 3000, which relates to allegations of corruption in Israel's purchase of German submarines.
As police and Israeli Security Agency investigators arrived at the prime minister's residence in Jerusalem, demonstrators protested outside - calling for Netanyahu's resignation.
A police spokesman declined to comment on the report that Mr Netanyahu was questioned.
In Case 1000, police say Netanyahu received gifts worth 1 million shekels ($280 million) from overseas businessmen.
Police investigators entered Mr Netanyahu's residence Friday morning and left about five hours later. In February police recommended that Netanyahu, 68, be indicted for bribery in two other corruption investigations.
The questioning came ahead of Netanyahu's visit to Washington next week, where he will address the AIPAC conference and will also meet President Donald Trump.
The case is one of at least four investigations surrounding the four-term prime minister or his associates announced last month, which have put his political survival in jeopardy. He has denied any wrongdoing.
Mr Netanyahu is accused of accepting almost $300,000 (Dh1.1m) in lavish gifts from Hollywood mogul Arnon Milchan and Australian billionaire James Packer.
Both were told that they were regarded as suspects in the case. In return, police say Mr Netanyahu operated on Mr Milchan's behalf on United States visa matters, legislated a tax break and connected him with an Indian businessman.
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.
Case 2000 involves a suspected illicit quid-pro-quo deal between Netanyahu and Yedioth Ahronoth newspaper publisher Arnon Mozes that would have seen the prime minister weaken a rival daily, the Sheldon Adelson-backed Israel Hayom, in return for more favorable coverage from Yedioth.