Police say a body found in a disturbed grave is believed to be missing teenager Jayden Parkinson.
A Thames Valley Police statement said the body was found "in a recently disturbed grave" in the cemetery of All Saints Church, Didcot.
Formal identification has yet to take place.
"Officers and forensic scientists will continue to work at the cemetery throughout the night and into the next day," the statement added.
"Jayden's family has been informed and is being supported by specially trained officers."
The 17-year-old disappeared on 3 December having last been seen leaving the town's railway station at about 16:30 GMT.
Jayden's ex-boyfriend Ben Blakeley, 22, of Christchurch Road, Reading, has been charged with her murder and with perverting the course of justice.
Police said there have been suggestions Jayden may have been pregnant, but they have been unable to confirm this.
A 17-year-old boy, from Didcot, who has been charged with perverting the course of justice, has also appeared in court and is due back on 17 March.
He is accused of assisting in the disposal of Jayden's body and other evidence.
More than 100 officers and detectives are working on the case, backed up by specialists from the National Crime Agency.
As well as the graveyard at All Saints' Church, a semi-detached house in Great Western Drive was also searched in the hunt for Jayden.
The house was just a few hundred yards away from the cemetery,
A cordon was also put up in a park which links Great Western Drive to an alleyway running behind the cemetery.
Forensic officers have been examining both areas.