New Delhi: A special police team formed to investigate anew Congress leader Shashi Tharoor's wife Sunanda Pushkar's murder has started work, Delhi Police Commissioner B.S. Bassi said Wednesday.

"The special team which was formed to investigate the murder is looking into each and every possibility of the case and whatever is needed will be done," he told the media.

On being asked whether Tharoor could also be questioned, Bassi said: "We will do, if needed."

On Tuesday, the police commissioner said that a case of murder has been registered against "unknown persons".