Sara Netanyahu, the wife of the Israeli Prime Minister, has undergone a lie-detector test in an attempt to deflect allegations she misused public funds.

Police are investigating her on fraud and breach of trust charges after the former caretaker of her official residence made claims she had told him to inflate the number of guests at dinners and to record their purpose as state instead of private in order to receive more money for them.

She has denied the charges.

Avi Hadad, the owner of the company which conducted the test, said that, "upon examination of the test, we did not find in Mrs. Netanyahu's answers to the relevant questions any physiological responses which would indicate she is lying."

Mrs Netanyahu is a divisive figure, and has been described as "one of the most unpopular people in Israel".

The results of private lie detector tests are not admissible in Israeli courts because they are not believed to be reliable.

The news of the test came amid reports on Israeli television that the attorney general was expected to indict her by September 10.