The husband of a 28-year-old British woman who died in Pakistan said that a 7.5in (19cm) bruise was found on her neck.

Samia Shahid, from Bradford, West Yorkshire, died last week while visiting relatives in northern Punjab.

Her family said she died from natural causes. But her husband, Syed Mukhtar Kazam, believes she was killed because of her marriage to him, her second husband. Ms Shahid's family has strongly denied any involvement in her death.

Mr Kazam, who said he has seen a post-mortem examination report, fears his wife may have been strangled.

He told the BBC: "I am not trusting the doctors and I am not trusting the police at the moment because the evidence I have now has changed everything.

"I have got the post-mortem report which clearly says she had a bruise mark - 19cm - that is around her neck."

Pakistan police have launched a murder investigation.

Bradford West MP Naz Shah announced she was looking into the death of one of her constituents amid claims she may have been the victim of a so-called honour killing.

Ms Shah told the BBC: "I have seen some pictures which are quite graphic in detail - that does really really raise some serious concerns. We need to get to the bottom of it as soon as possible."

Ms Shah told the BBC she is "confident" that answers will be found about what happened as it became "a murder investigation within 48 hours and since senior police officers have been appointed to this case".

Mr Kazam married his wife in Leeds in September 2014 after she left her first husband, who was a cousin from Pakistan.

He said his wife moved to live with him in Dubai last year but had made trips to the UK to talk to her parents about the relationship.

He said she went to Pakistan on July 14 as a member of her family was ill.

Mr Kazam said his wife had been healthy and he did not believe reports of her dying naturally. The cause of her death has been variously reported as being from a heart or asthma attack.