A man's been arrested in Aylesbury on suspicion of murdering a mother - who was stabbed in the neck as she pushed her baby in a pram.
The 25-year-old suspect has been detained in Aylesbury - around 170 miles south of Bradford, where the attack happened on Saturday.
Police had been looking for Habibur Masum - who knew the victim - in the Greater Manchester area - but haven't confirmed the identity of the person in custody.