An 80-year-old man has been arrested on suspicion of murder after another pensioner died at a block of flats.
Emergency services were called to the property on Silverdale Close in Aylesbury, Buckinghamshire at 16:20 GMT on Friday.
A man in his 70s was found with serious injuries and died at the scene.
Thames Valley Police said the two parties were known to each other and a murder investigation had been launched.
