A young couple in Pakistan were tied up and had their throats slit with scythes after they married for love, police said.
The 17-year-old girl and 31-year-old man married on 18 June without the consent of their families in eastern Pakistan's Punjabi village of Satrah, police said.
The girl's mother and father lured the couple home late on Thursday with the promise that their marriage would receive a family blessing, a local police official said.
"When the couple reached there, they tied them with ropes," he said. "He [the girl's father] cut their throats."
Police arrested the family, who said they had been embarrassed by the marriage of their daughter, named Muafia Hussein, to a man from a less important tribe.
Cultural traditions in many areas of Pakistan mean that killing a woman whose behaviour is seen as immodest is widely accepted.
Immodest behaviour that sparked recent killings included singing, looking out of the window or talking to a man who is not a relative.
For a woman to marry a man of her own choice is considered an unacceptable insult by many families.
The Human Rights Commission of Pakistan said 869 so-called "honour killings" were reported in the media last year – several a day.
But the true figure is probably much higher since many cases are never reported.
The weak Pakistani government, battling with a troubled economy and a Taliban insurgency, does not collect centralised statistics and has no strategy to combat the killings.
Pakistani law means that even if a woman's killer is convicted, her family are able to forgive the killer.
Many families simply nominate a member to do the killing, then formally forgive the killer.
That is what happened earlier this week, a lawyer said, when a tribal council in central Pakistan's Muzaffargarh district sentenced another young couple to death for marrying for love.
The couple's lawyer, Zia Kiyyani, said the two had appealed for police protection after their marriage on 21 June, but had not received any.
The 19-year-old girl's family came to take her from her husband's family, swearing on the Koran that they would not harm her and would hold a proper wedding ceremony, he said.
"During this the girl shouted, cried and mourned for her life and her husband's life because she knew that they will kill both of them," he said.
The girl, named Mehreen Bibi, was shot by a member of her family when she returned home, police said.
Her husband went into hiding and her father registered the murder complaint so he could forgive the killer, Mr Kiyyani said.
"That will end the case," he said.