*NETANYAHU'S ISRAELI INVESTIGATIONS*

INVESTIGATORS again question Prime Minister Netanyahu over graft cases.

Investigators last Monday questioned Israeli Prime Minister Benjamin Netanyahu over one of  several graft cases that threaten to topple him, a police statement said.

Several media reports said the premier was questioned at his official Jerusalem residence over a case of alleged corruption involving local telecoms giant Bezeq.

The report said he could for the first time have faced questions over information provided  Nir Hefetz, a longtime Netanyahu aide who has turned state witness.

Netanyahu's wife Sara and son Yair were questioned separately at fraud squad headquarters near Tel Aviv, as was Shaul Elovitch, Bezeq's largest shareholder, media reported.

The police statements confirmed that the Netanyahus were interviewed by investigators from the  national fraud squad and the Israeli Securities Authority, without giving further details.

''The prime minister, his wife and son were questioned for a number of hours,'' it said. The supervision is being carried out with the supervision of the state attorney and with the approval of the attorney general.

This is the ninth time Netanyahu has been questioned in various cases directly or indirectly concerning him.

It was the first time Yair Netanyahu had been questioned media reports said.

Netanyahu maintains he is innocent and has denounced allegations against him as a media and police witch hunt..

On February 13, police recommended he be indicted in two cases, though the attorney general has yet to decide whether to do so.

In the Bezeq case, Netanyahu is alleged to have sought favourable coverage from EIovitch's Walla news in exchange for government policies that may have benefited the mogul's company by hundreds of millions of dollars. [Agencies].