New Delhi: Days after police registered a case of murder in the death of Sunanda Pushkar, the much-publicised case has now got a new twist.

It has come to light that Delhi Police officials had questioned former union minister Shashi Tharoor's domestic help Shri Narayan Singh in November last year in connection with the case and he, as per a newspaper report, had revealed that a man named 'Sunil' had visited Sunanda at Hotel Leela Palace two days before she was found dead.

Narayan, who was again questioned on Thursday, had reportedly told cops last year that 'Sunil sahab' had assisted Tharoor's wife Sunanda in posting messages on Twitter and also in copying some of the tweets.

The domestic help is also reported to have revealed that Sunanda had told Tharoor over phone from the hotel that he was "finished" as she had revealed everything to the media.

Narayan had also told police about the fight the couple had in Dubai.

Sunanda was found dead in a south Delhi hotel room on January 17, 2014 in mysterious circumstances. Police registered a murder case earlier this week based on a final medical report by AIIMS which said she died due to poisoning.

Narayan was present at the hotel when Pushkar died.

A day before her death, Sunanda and Tharoor had issued a joint statement denying reports that they had a row over his alleged affair with a Pakistani journalist.

Tharoor was then a minister in the government of then prime minister Manmohan Singh. He was re-elected to the Lok Sabha in May last year.

Police officials said that they are likely to call other members of Tharoor's staff as also hotel staff for questioning in the next few days.

Delhi Police Commissioner BS Bassi, who on Friday submitted a status report before Delhi Lieutenant Governor Najeeb Jung, had told the media yesterday that Tharoor has so far not been asked to join the investigation.

"We have not served any formal legal notice to anyone. The investigation officer is yet to get more information and, only after that, he will decide which person is to be examined," Bassi said.

"As of now, no notice has been given yet because there are many facets to investigate," he added.

Tharoor, in a letter to Bassi dated November 13 that became public knowledge on Wednesday, had said a Delhi Police officer attempted to implicate him and Narayan in the murder of his wife. However, Bassi denied the allegation.

Tharoor is undergoing Ayurvedic rejuvenation treatment at a centre at Thrissur in Kerala.