The affair pertains to conversations he had with "Yedioth Ahronoth" owner and publisher Arnon Mozes, who was also questioned Thursday by police.
Netanyahu addressed the affair in an hour-long question session before the Knesset, in which he exclaimed, "It is legal to receive gifts from friends. They're investigating me? They're accusing me? This is a bad joke."
The prime minister continued, "Anyone with eyes in their head can see there is an unprecedented, hypocritical witch-hunt going on, asserting its pressure to change the government through media pressure on the attorney general, so that he will submit an indictment at any cost.
"People, by the way, are saying this. Politicians, those in the media, commentators are saying this. (These people) are terrorizing those in charge of enforcing the law, and their message is clear: if you don't indict Netanyahu, you no legal expert. They tell them: bring me the head of Netanyahu, and if not, you're no attorney general, you're no state attorney."
Arnon Mozes is the publisher and owner of Yedioth Ahronoth Group, which includes Ynet.