A brother has been tortured and forced to listen to his 17-year-old sister being gang-raped after they were kidnapped by a Muslim gang in Pakistan after refusing to convert from Christianity.

The British Pakistani Christian Association say they have been assisting the family in Kasur in the east of the country following their ordeal.

According to the charity, the Muslim gang targeted the family home, which was a mud house in a small village, knowing that they were Christian and threatened them with guns, sticks and metal poles.

A brother has been tortured and forced to listen to his 17-year-old sister being gang-raped after they were kidnapped by a Muslim gang in Pakistan after refusing to convert from Christianity. Pictured are Christians in Pakistan

The gang told them to convert to Islam or die but the family refused and said they were staying resolute to Christianity.

The men then tied up and blindfolded all but two of the family 20-year-old Arif and 17-year-old Jameela and took them to a n unknown building.

There, Arif was tortured and then had to listen as his sister was gang raped in a separate room.

The next morning he managed to escape and return to his family, who had escaped their shackles.

But his sister Jameela was left behind and she remains missing.

According to the charity, local police have refused to investigate the case and the family are deeply traumatised.

Wilson Chowdry, chairman of the British Pakistani Christian Association said: 'We will now begin the arduous task of helping them rebuild their lives in an atmosphere of safety.

'However, the captured daughter Jameela may well never be found and her malicious kidnap is causing great anguish and despair.

The scene of a killin of a Christian couple in Kasur in 2014. Christians make up about four per cent of Pakistan's population and tend to keep a low profile in a country

'That Muslim despots can kidnap Christian girls with such impunity is a blight on Pakistan's international reputation.'

Christians make up about four per cent of Pakistan's population and tend to keep a low profile in a country where Sunni Muslim militants frequently bomb targets they see as heretical, including Christians, and Sufi and Shi'ite Muslims.

All of Pakistan's minorities feel that the state fails to protect them, and even tolerates violence against them.

In 2014 a British man with a history of mental health illness, sentenced to death for blasphemy earlier this year, was shot by a prison guard in his cell.