A 50 year old man and 29 year old woman remain in Police custody on Wednesday morning.
The pair were arrested on suspicion of murder, following the discovery of the body of a 33 year old man in a property in Molesworth Road in Plymouth in the early hours of Tuesday morning.
Devon and Cornwall Police said a forensic post mortem is due to be carried out to identify the actual cause of death.
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It will be dry and bright in the morning but as the day goes on it will become wet and very windy.
Eastern parts will have heavy rain in the morning, clearing by afternoon.
Fire and Rescue Service says it received a 999 call to say there had been an explosion in a third floor flat within a mid terraced building.