A Russian spy ship has been escorted out of the Irish Sea after it entered Irish-controlled waters and patrolled an area containing critical energy and internet submarine pipelines and cables.

It was spotted on Thursday east of Dublin and south-west of the Isle of Man but Norwegian, US, French and British navy and air defence services initially observed it accompanying a Russian warship, the Admiral Golovko, through the English channel last weekend.

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Its presence has raised fresh concerns about the security of the interconnector cables that run between Ireland and the UK carrying global internet traffic from huge datacentres operated by tech companies including Google and Microsoft, which have their EU headquarters sited in Ireland.

The sighting of the Russian intelligence ship came as British defence forces monitored other Russian vessels near its eastern coastal waters. On Thursday, British jets were also scrambled to monitor a Russian reconnaissance aircraft flying close to UK airspace, the Ministry of Defence said.

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