Both scenes have been sealed off for technical examination and Gardai are appealing for witnesses
Separate investigations are underway after two men were found dead in unrelated circumstances in County Meath this weekend.
Gardaí were alerted of an incident at a house in Navan yesterday evening.
The body of a man in his 40's was discovered in the house on Academy Street.
A woman in her 30s was arrested shortly afterward and taken to Kells garda station for questioning.
The body remains at the scene and the local coroner has been notified.
Gardai say they're investigating all the circumstances surrounding his death.
The body of a second man was discovered hours earlier, in an unrelated incident in Ashbourne.
Gardai say investigations are ongoing and further updates will follow.
Anyone with information is asked to contact the incident room at Navan Garda Station 046-9036100 or the Garda Confidential Line 1800 666 111.