New Delhi, May 20 (IANS): A court here on Wednesday allowed Delhi Police to conduct polygraph tests in the Sunanda Pushkar murder case on three suspects, closely associated with her husband and former union minister Shashi Tharoor.

Metropolitan Magistrate Sunil Kumar Sharma, during an in-camera proceeding, allowed police to conduct the polygraph test on three suspects after the trio give their consent.

Police had last week moved an application seeking a lie detection test for the three suspects -- Tharoor's domestic help Narayan Singh, his driver Bajrangi and his friend Sanjay Dewan -- in the murder case.

The lawyers of the trio told the court that they were ready to undergo the test but police had to follow proper guidelines issued by the Supreme Court and the National Human Rights Commission (NHRC).

Earlier, police have recorded their statements as witnesses in the case.

Pushkar was found dead under mysterious circumstances in a luxury hotel in Delhi on January 17, 2014. Police registered a murder case on January 1, 2015.