A nuclear power plant in Ukraine, has been seized by the Russians.

During fierce fighting during the night, there were concerns of a major radioactive event, as Russian artillery rounds and small arms fire erupted around the site.

This power plant supplies about one quarter of the electricity to Ukraine.

Flames were seen at the facility, but the International Atomic Energy Agency says the building hit by Russia was not part of the reactor.

There are have been no reports of a radiation leak, and fire fighters were able to put out the blaze.

Prime Minister Justin Trudeau and other world leaders have condemned the attack, which Russia claims was a case of arson, not artillery fire.