A federal investigation is taking place into the breaching of the computer systems in at least one nuclear power plant

US authorities are investigating a cyber intrusion affecting multiple nuclear power generation sites this year,' the report stated.

The report does not identify which U.S. nuclear facility was involved in the breach. Authorities say only the business-associated side of the plant’s systems were compromised. According to the report, it’s not yet clear who was behind the attack or if the breach was associated with any other recent worldwide incidents.

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One U.S. official called it an "ongoing matter" that is being investigated. No public authorities have issued word on who may be responsible, but agencies are looking at the possibility that another country may be behind the hack.

It was unclear if the case is related in any way to other known cyberattacks.

However, it was reported on the same day hackers unleashed a major cyber attack causing huge disruption to companies and governments across the globe including in the UK, US and Russia.

Read more: http://www.dailymail.co.uk/news/article-4647098/At-1-power-plant-s-computer-systems-