Pakistani police have launched a murder hunt after the widow and mother-in-law of a man shot dead by CIA contractor Raymond Davis last year were killed.

Police suspect Zohra Haider's father of killing her and her mother.

It is thought he was upset at her plans to re-marry, fearing either dishonour or that he might lose out financially.

The acquittal came when relatives of the dead men pardoned him in court in return for receiving compensation estimated to be about 200 million rupees ($2.34m, £1.1m), known as "blood money". Under Pakistani Sharia law, relatives of a murder victim can pardon the killer.