Gardaí investigating the murders of Eoin O'Connor and Anthony Keegan in Meath have arrested a man.
The bodies of the men in their 30s were discovered on an island in Lough Sheelin, County Meath in May, a month after they were reported missing.
The man in his 50s is being detained under the Offences Against the State Act 1939 at Kells Garda Station.
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This is the third arrest to date in relation to this investigation.
In June, gardaí arrested two men in the Cavan area in relation to the deaths.