By Sharon Marris, news reporter
The police officer killed while investigating reports of a burglary died from multiple injuries, a port-mortem has revealed.
PC Andrew Harper, 28, died after being dragged along the road by a vehicle in the Berkshire village of Sulhamstead at about 11.30pm on Thursday.
Police say ten boys and men arrested shortly after were found at a council-run caravan and mobile home site nearby.
A court granted permission on Saturday for the suspects – aged between 13 and 30 – to be kept in custody for a further 36 hours while investigations continue.
Detective Superintendent Ailsa Kent, of Thames Valley Major Crime Unit, said: "The cause of death is consistent with our current belief that Andrew was caught between a vehicle and the road and then dragged for a distance."
Det Sup Kent said it remains unclear how PC Harper "came to be out of his vehicle and then caught under the suspect vehicle".
She said: "What we do know is that Andrew and his crewmate were attending a reported burglary in Bradfield Southend.
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"While responding, the officers located a vehicle that was suspected to be involved in the burglary, in Lambdens Hill."
PC Harper was a member of the Roads Policing Proactive Unit based at Abingdon police station.
He was also a newlywed, having married in Oxfordshire last month.
He and his wife Lissie were due to enjoy their honeymoon together next week.