Retired farmer Llywelyn Thomas was 76. He had been badly beaten and his home at Chittering near Ely ransacked. Frankie Parker, 25, of Nene Road, Ely, and Gary Smith, 20, of no fixed address, were both arrested earlier and have been charged with his murder.
Two men have been re-arrested by detectives investigating the murder of a pensioner in his Cambridgeshire home last year.
Llywelyn Thomas, who was 76, was found dead in Chittering on 18 December.
The men, aged 25 and 20, are being questioned at different police stations.