Police didn't name the politicians involved when making the announcement today. After a yearlong covert operation, police said they are investigating 30 suspects including a deputy minister, a former minister, mayors and others.
In a statement, police said officials are suspected of nepotism, and illegally transferring funds to various bodies.
Deputy Interior Minister, Faina Kirshenbaum, of Foreign Minister Avigdor Lieberman's Yisrael Beteinu party, confirmed that she had been called in for questioning while denying any wrongdoing.
"I am sure of my integrity and I have no clue what the investigation is about," Kirshenbaum told Channel 2 TV.
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Lieberman himself was recently investigated for corruption, but was cleared of wrongdoing in 2013.
Lieberman's party could play a pivotal role in the elections. He has traditionally allied with the right-wing bloc but recent comments have raised questions about a potential strategic shift.
Lieberman chastised Prime Minister Benjamin Netanyahu for his strategy in talks with the Palestinians during a conference at Tel Aviv University on yesterday.
He warned Israel would face a "diplomatic tsunami" and its economy and foreign relations would suffer without an agreement. US-brokered peace talks collapsed last spring.
His comments add uncertainty to the March election as it raises the possibility he might not automatically align his party with Netanyahu's right-wing bloc.