Two cars have been seized and examinations are taking place at the scene, as well as a home in Athlone.

Earlier this afternoon, a body was found on a farmland on the Roscommon side of Athlone.

Anyone with any information is asked to contact Mullingar Garda Station on 01 666 9000, the Garda Confidential Line on 1800 666 111, or any Garda station.

21 people were killed and 182 were injured.

The arrests come as part of the Garda investigation into organised criminal activity and burglaries in Mayo, Roscommon, Longford, Westmeath and Sligo.

A man in his 30s was taken by air ambulance to the Mater Hospital in Dublin where he remains in a serious, but non-life threatening condition.

The incident took place on the Dublin road close to a local national school in the town just after 9am.

The occupants of the car were disturbed during a break in and left the scene in a black VW Golf.