New Delhi: The Delhi High Court on Wednesday asked its Joint Registrar to decide on May 21 a date, when the blood samples of senior Congress leader ND Tiwari, Rohit Shekhar and his mother Ujjwala will be taken.

In 2008, 32 year old Rohit had claimed to be Tiwari's biological son.

On Monday, the court had given 86-year-old Tiwari two days to either "gracefully appear" for a DNA test, or be forced to take the test by the Delhi Police.

Since Tiwari didn't respond, the court hit out at him calling it a contempt of court. In the past Tiwari has skipped several court hearings. The court has asked the registrar to use all its might and get the DNA test if Tiwari does not turn up in court on the appointed date.

Tiwari, the former Chief Minister of Uttar Pradesh and Uttarakhand, has already been directed by the High Court and the Supreme Court to furnish a blood sample for the DNA test.

Tiwari, who had also held key ministerial portfolios at the Centre, was forced to resign as the Andhra Pradesh Governor in 2009, amid allegations of sexual misconduct against him, following a sting operation in news channels.