Pakistani journalist Mehr Tarar could also be questioned in the murder of Sunanda Puskhar. Remember, Tarar was at the centre of a raging controversy involving Shashi Tharoor. On the night Pushkar was found dead, Tarar had tweeted: "What the hell. Sunanda. Oh my God!"

Tarar, a 45-year-old Lahore-based journalist, in another tweet said, "I just woke up and read this. I'm absolutely shocked. This is too awful for words. So tragic I don't know what to say. Rest in peace, Sunanda."

Pushkar, upset over an alleged extra-marital affair between Tharoor and Tarar, was found dead in a five-star hotel in what police believe is a case of suicide.

 Pushkar and Tharoor were at the centre of a row in the past two days when reports emerged that she was upset over reported text and tweet messages between her husband and Tarar.

Tarar, the mother of a 13-year-old son, had denied having an affair with the suave thrice-married Tharoor.

She also shot off uncharitable barbs at Pushkar and defended herself. Asked if she knew Tharoor, Tarar said on Thursday, "I met him in April last year for an interview in India. Then I met him in June in Dubai in a social gathering. Yes, I have been in touch with him once in a while on Twitter and email."