Police in the Pakistani city of Lahore have arrested a woman suspected of murdering her daughter for marrying without family consent.
Police say the body of Zeenat Rafiq shows signs of torture. She was doused with fuel and set alight.
Her mother Parveen is accused of luring her back from her in-laws.
It is the third such case in a month in Pakistan, where attacks on women who go against conservative rules on love and marriage are common.
Last week a young school teacher, Maria Sadaqat, was set on fire in Murree near Islamabad for refusing a marriage proposal. She died of her injuries.
A month earlier village elders near Abbottabad ordered the murder of a teenage girl who was burnt to death because she helped a friend to elope, reportedly.
Zeenat Rafiq, who was 18, had been burnt and there were signs of torture and strangulation, police told foreign media.