Detectives have been given 21 more days to come up with a list of substances from Pakistan which might have been used to poison a young Bradford mum.

Coroner Roger Whittaker heard yesterday how police investigating the tragic death of 22-year-old Sana Abbasi were working with experts in Pakistan to compile the list of lethal substances.

The inquest heard how a number of natural metabolic disorders which could have caused Mrs Abbasi’s death had been “ruled out” which Mr Whittaker said indicated her death was “more likely due to poisoning”.

Mrs Abbasi, who had a three-month-old daughter, died in Bradford Royal Infirmary on July 9 this year – she had been detained there with an unexplained illness since April 29, shortly after the birth of her daughter.

Detectives turned to a social networking site for clues. They tapped into her Facebook in a bid to contact her family and friends, hoping to find out more about her lifestyle.

Earlier this year the Telegraph & Argus reported a 23-year-old man and a 56-year-old woman, of Pollard Park, Bradford – believed to be Sana’s husband and his mother – were arrested on suspicion of murder. They have since been released on bail pending further inquiries.

Her baby is now in the care of social services.

Mrs Abbasi, of Rawalpindi, married her Bradford husband in an arranged marriage in Pakistan four years ago.

She came to the UK in December 2007 and had been living in Pollard Park, she was well-educated and was fluent in both Punjabi and English.

Police have previously refused to comment on her home life but it is understood she was desperately lonely and unhappy in Bradford.

She still has family living in Pakistan.

A second post-mortem examination has now been carried out and there might be a third.

As the inquest was adjourned for another 21 days, Detective Chief Inspector Mark Ridley told Mr Whittaker: “I’m confident we will have completed all the work we will need in that time.”