A police spokesperson says a Knesset member has been questioned under caution over corruption suspicions surrounding funding for the Balad party.
Suspicions include forgery, receiving bribes, falsifying documents and money laundering, police say, adding that the probe came out of a State Comptroller investigation into funding for Balad, a hard-line Arab party that is part of the Joint List faction.
Police do not say who from the party was questioned. One MK, Basel Ghattas, is expected to be charged soon over accusations he passed phones and other contraband to Palestinian terrorists serving time in Israeli prison.
Police say the investigation is being headed up by the 433 anti-fraud unit.