Detectives investigating the death of a police officer said he died of "multiple injuries" as they were given more time to question 1
PC Andrew Harper, 28, responded to a report of a burglary Thursday in
Ten men between the ages of 13 and 30 were arrested on suspicion of murder.
Thames Valley Police said an additional 36 hours were given for questioning suspects on Saturday.
RS Harper, who got married four weeks ago, was killed on the road in Bath A4 in the village of Sulhamsted.
Det Sills Ailsa Kent told a news conference: "Andrew's body was killed and the cause of death was recorded as multiple injuries.
" The cause of death is in line with our current belief that Andrew was caught between vehicle and road and then towed for a distance. "
She said that 10 boys and men were arrested at the community-operated caravan and mobile home site Four Houses Corner, about three miles from where PC Harper died, and remain in custody.
Officers are conducting house-to-house investigations, reviewing CCTV footage, questioning witnesses and conducting forensics, added Det Soup Kent.
White overalls forensics officers could be seen combining the area as police widened the border around the scene earlier.
Thames Valley Police Chief Constable John Campbell says RS Harper's death left the whole force "shocked and saddened"
Mr Campbell said the officer was a "highly valued, popular member of the team" and his death was a "significant loss" to the forces, as well as to his colleagues and friends.
PC Harper, who became a regular officer in 2011 after joining as a special police officer a year earlier, was killed at the intersection of Ufton Lane and Lambdens Hill.
He was present at reports of a breakdown around 23:30 BST with a colleague.
The duty officer with PC Harper was not physically injured but was receiving emotional support, Thames Valley police said.
Mr Campbell said that PC Harper was a "highly regarded, popular member of the team" with an "incredible personality".
Thames Valley Deputy Police and Crimes Commissioner Matthew Barber said that he received messages from members of the public computer Harper helped.
The victim of domestic violence told him that the officer had given her the confidence to speak for her abuser.
"Apparently he was a man who, in his time, time, touched many lives," added Mr Barber.
PC Harper's relatives also paid tribute on social media to "the most loving person you will ever meet".
Maureen Shrimpton wrote: "Just a really horrible day. Our grandson Andrew was killed last night while doing his police work.
" So proud of him. Our love goes to his wonderful wife, mom and dad, brother and all his family and friends. "