The young Pakistani woman angered her family by eloping with a man they disapproved of last month, police said.
But Zeenat Rafique, 18, came home to Lahore on Wednesday under the impression that a reconciliation could occur, Punjab police spokesperson Nabeela Ghazanfar said.
When Rafique arrived, her mother and brother tied her to a bed, poured gasoline on her body and set her on fire, he said. She died on the spot, Ghazanfar said.
The mother, Parveen Bibi, turned herself over to authorities and has expressed no sorrow for her actions, police said. She’s now in custody.
The brother, Ahmer Rafique, has not been arrested and is on the run, police said.
CNN has been unable to contact Rafique’s husband, Hassan Khan.
Around 1,100 women were killed by relatives in Pakistan last year, according to the country’s independent Human Rights Commission.
The crimes originate from tribal practices and are often meted out as punishment for behavior viewed as bringing dishonor to a family or village.