Police are investigating the deaths of three men in their 80s which all took place in Exeter over the last two days.
On Monday, the body of one man was discovered at a property on Bonhay Road and a murder investigation was launched.
Separately, the bodies of two men - also believed to be in their 80s - were discovered at an address in Cowick Lane on Tuesday.
Officers say this incident is currently being treated as unexplained.
Devon and Cornwall Police say it is "too soon" to tell whether the incidents are linked.