FAMILY and friends of a Scots businessman and his wife murdered in a suspected "honour" killing in Pakistan have made a fresh appeal for justice, more than two months after their deaths.

They are increasingly concerned there has been no positive progress in interviewing or extraditing the chief suspect in the murders from the US to Pakistan.

Saif Rehman, 31, and his American wife Uzma Naurin, 30, were shot dead when their car was ambushed on November 1 in Lalamusa in the Punjab province of Pakistan.

Mr Rehman's 24-year-old brother Abdul Majid said the family had been given no positive news yet from officials over the arrest or questioning or the chief suspect, Ms Naurin's father, Muzafar Hussain, who lives in New Jersey.

Questions posed to local police in Pakistan by The Herald have been left unanswered for weeks.

Mr Majid, who has been living in London and Glasgow, said: "We have not heard anything about extradition at the moment.

"The Pakistani police caught the driver of their car and he made a statement and has told the police that Uzma's father was involved.

"I have been very upset about all this and I am just praying for my brother. We want to see justice. Hopefully, the American government will do something. Hopefully, they will be caught in America, soon.

"If they can't do anything then I will appeal to the American government for further inquiries."

Mr Hussain, a 58-year-old taxi driver who has denied any involvement, appeared to have discharged himself from a hospital in Kharian where he was having a minor operation and disappeared after the November 1 killing. It is understood he did not attend his daughter's funeral, but instead boarded a flight for the US.

Soon after the murders, Mr Rehman's Pakistani parents Mohammad and Gulnisa Zakir wrote to the US ambassador in Pakistan, Cameron Munter, asking for help in tracing those responsible for killing their son and his wife.

There have been fears raised that the authorities investigating the killings will not take the crime seriously or do enough to bring those responsible to justice.

Some experts believe any extradition to Pakistan would not be straightforward because the treaty between the US and Pakistan was signed in 1931 when the UK controlled the territory.

While the accord is believed to be valid, it is claimed lawyers could delay matters for at least a year by questioning it.

Amnesty International says gender-based violence, including rape, forced marriage, "honour killings" and other abuses are committed with impunity in Pakistan as police are reluctant to register and investigate complaints.

The Human Rights Commission of Pakistan recorded 791 "honour" killings of women in 2010, with at least 26 of them raped or gang-raped as well.

Mr Rehman was shot dead in front of his sister Fauzia and two-year-old niece.

The killers then took Ms Naurin to an isolated spot 10 minutes away and shot her, before dumping her body in nearby bushes.

Ms Naurin, who lived in New York, was the first in her family to shun the traditional arranged marriage and wed a man of her choice.

It is said her parents could not accept it and she moved out of the family home.

Mr Rehman and Ms Naurin were married in a private ceremony in a Glasgow house three years ago, but held a walima or marriage banquet at the Kabana Restaurant in Kinning Park in June, 2010, in the hope Mr Hussain, who had flown to Scotland from the US, would be supportive.