The death of the 28-year old woman in her apartment in Christchurch is still being investigated as the preliminary autopsy is unable to identify the cause of her death.

Tina Sharma was found dead in the hallway of her apartment at on Monday, September 11 by her husband, Narinder Singh. Emergency services when arrived at 9:10 a.m. at the apartment Ms Sharma lying unresponsive and her husband Narinder performing CPR on her.

Ms Sharma came to New Zealand two and half months ago and lived with her husband on Selwyn Street near Hagley Park in Christchurch.

Ms Sharma’s brother Deepak Sharma also lives in Christchurch.

As per media reports, Mr Singh called his brother-in-law Mr Sharma at 9:20 a.m. and asked him to “come over”.

The media also earlier today reported that the provisional autopsy report authorised by the coroner said there was “no anatomical cause” found.

"There is no evidence of fatal assault. Many further test results pending." Police told media.

As per sources, Mr Singh said he came to his apartment on Sunday, September 10 at 11 p.m. after finishing work and helped his wife cook. Mr Singh then listened to music, had beer while Ms Sharma lay on the couch.

On Sunday night, the couple had also discussed about having a baby but decided to wait until Ms Sharma’s qualification as a pharmacist completes in a year’s time.

Ms Sharma slept on the couch while Mr Singh listened to music and had beer.

Mr Singh told media that later he later tried to wake Ms Sharma and then picked her up to take her to their bedroom. On the way down to the room on the stairs, Mr Singh tripped on his track pants, and the couple fell.

Once on the floor, Mr Singh realised his wife’s face and lips were blue, and her nails too turned blue.

Mr Singh then tried to give her CPR as her though she must be having a breathing problem and still had a little breath.

Mr Singh then called the ambulance while continued giving her CPR.

The ambulance arrived 10 minutes later and pronounced Ms Sharma dead.

Ms Sharma’s brother told media that he had spoken to her earlier on Sunday.

When Mr Sharma arrived at the scene, he saw his brother-in-law Mr Singh sitting in the police car and his sister’s body in the ambulance. A police officer at the scene told him that his sister died.

Ms Sharma’s cousin Sukhpreet Sharma and brother-in-law Nitin Singh also live in South Island.