Sunanda Pushkar
Shashi Tharoor with his late wife Sunanda Pushkar.IANS File

As Special Investigation Team (SIT) began probe into the high-profile Sunanda Pushkar death case on Wednesday, Delhi police commissioner BS Bassi said Sunanda's husband, former Union Minister Shashi Tharoor may be questioned, if needed.

"The special team is looking into each and every possibility. Whatever is needed will be done," IANS quoted Bassi as saying on Wednesday.

Responding to a media query, Bassi said, "The Congress leader will be interrogated, if need be."

Apart from Tharoor, his family, relatives and personal staff too will be questioned in the case. The SIT will also question the employees of the Leela Palace hotel where her dead body was recovered on 17 January last year, PTI sources said.

The hotel doctor, who declared Pushkar dead, will also be interrogated, while the CCTV footage of the hotel and forensic report of Pushkar's mobile phones and laptop will also be evaluated.

As the police gave a new direction to Pushkar's death probe and by registering a murder case on Tuesday under IPC Section 302, BJP leader Subramanian Swamy added his own little twist to her mysterious death with his tweets.

"Another Sunanda mystery for PTs: Sunanda was checked into Rm 307. But body found in 345. Why?" he tweeted on Wednesday.

Delhi police registered a murder case against unknown persons based on the AIIMS' medical reports, in which the doctors claimed that Pushkar's death was unnatural and she was administered poisoned -- either orally or via injection.

Delhi Police had met Pushkar's doctors in Kerala

PTI sources said that the Delhi police had earlier met Pushkar's doctors at a hospital in Kerala's Thiruvananthapuram region, where she was admitted before her body was found under mysterious circumstances in New Delhi's five-star hotel.

"The team met the doctors who had treated Pushkar and questioned them about the ailment she was admitted there for and asked them to share her medical records," a senior police official said.