The Naval Service confirmed that the LÉ William Butler Yeats detained two Irish-registered fishing vessels approximately 75 nautical miles southeast of Cork Harbour.
The two vessels were among 25 Irish trawlers fishing in the area, which has seen an increase in activity since the closure of a prawn fishery at the Porcupine Bank off the west coast of Ireland.
It is expected that the two vessels will be handed over to An Garda Síochána on arrival at Cobh and their skippers may be charged within 48 hours or summonsed to appear in court at a later date.
These latest detentions brings to 10 the number of fishing vessels detained by the Irish Naval Service for alleged fishing offences in Irish waters since the start of 2020.
The Naval Service conducts at-sea fishery inspections in line with a service level agreement with the Sea Fisheries Protection Authority.