A 13-year-old has been arrested on suspicion of murder following the death of a 12-year-old boy.
It is the third arrest linked to the investigation into the death of Roberts Buncis, after a 14-year-old appeared in court charged with murder on Monday.
A 19-year-old male also detained in connection with the inquiry has since been released with no further action.
Roberts was found dead on ground off Alcorn Green in Fishtoft, near Boston, Lincolnshire, on Saturday, just two days before his 13th birthday.
On Monday, a 14-year-old boy, who cannot be named for legal reasons, appeared before the Recorder of Lincoln, Judge John Pini QC, in a five-minute hearing, after being charged with the youngster's murder.