Gardai and the Army's bomb disposal team are dealing with a suspect device this morning in the Mount Assumpta area of Ballina.
Gardai say the area has been sealed off, and a number of residents were evacuated overnight and are being accomodated with neighbours and relatives.
There's limited access to the area from Lord Edward Street and McDermott Street, while areas of Mercy Road and Fenian Row are also restricted.
Gardai have confirmed that the Army's Explosive Ordnance Disposal team was called to the scene, and roads in the area are expected to re-open in the next hour.
Schools in the area are open as normal this morning.