Police have confirmed that remains found at a house in Ellesmere Port are human.
The remains were discovered in an outbuilding of the address in Hylton Court on Wednesday.
A post mortem examination took place last night and revealed cause of death to be blunt force trauma.
Police believe the remains belong to a missing French man, Christophe Borgye, who was reported missing in May 2009.
A 34-year-old man is being questioned in connection with the death, while a 35-year-old man who was arrested after he contacted police has since been sectioned under the Mental Health Act.
Anyone with any information should call police on 101 quoting incident number 932 of May 13 or alternatively contact Crimestoppers anonymously on 0800 555 111.