Investigators arrived Friday at Netanyahu's official residence in Jerusalem as protesters gathered outside with a large banner bearing Netanyahu's face and the words "crime minister" and chanting slogans calling for justice.
The train, travelling at speeds of up to 160 kilometres per hour (100 mph), traverses a series of new tunnels and bridges, passing through hills between Jerusalem and the airport, about 40 km (25 miles) away.
This came in response to Paraguay after it decided to move back it's embassy from Jerusalem to Tel Aviv. As most countries do not recognize Israeli sovereignty over the entire city of Jerusalem and say its final status should be set in peace talks.
Despite the probes, the right-wing leader's popularity has risen in the past few weeks, a reflection, commentators said, of his tough security policies and the opening of the American Embassy in contested Jerusalem.