Sara Sharif’s body was discovered at the family’s home near Woking, southern England, on Aug 10.

A post-mortem examination revealed she had sustained “multiple and extensive injuries” over a sustained period.

Her relatives were arrested late on Wednesday at London’s Gatwick Airport after disembarking a flight from Dubai following a month on the run in Pakistan.

Police said Urfan Sharif, 41, his partner Beinash Batool, 29, and his brother Faisal Malik, 28, fled to Pakistan to take refuge with relatives before Sara’s body was found, sparking an international manhunt.

All three have also been charged with causing or allowing the death of a child, Surrey police said in a statement.

They are in custody and due to appear in court later on Friday.

A Pakistan police spokesman earlier said that Sharif, Batool and Malik had voluntarily returned to Britain with the prior knowledge of authorities.

Surrey police said previously the three were thought to have flown to Islamabad on Aug 9, the day before Sara’s body was discovered.

An early morning emergency call alerting officers to Sara’s death was made from Pakistan by a man identifying himself as the father, detectives said.