Police in Pakistan have arrested a couple for allegedly killing their 15-year-old daughter by throwing acid on her because she supposedly had an affair with a boy, according to officials.

Local government official Masood-ur-Rehman says the couple were arrested on Tuesday in Pakistan-administered Kashmir.

Police officer Imtiaz Ali says the parents confessed to killing the girl a day earlier because they believed she had sullied the family's honour.

He said on Friday that a post-mortem examination confirmed that the girl died of acid burns.

Honour killings are widespread in Pakistan, where scores of women are murdered every year for marriages or relationships not approved by their families.

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