The Zaporizhzhia nuclear power plant in Ukraine, the largest of its kind in Europe, was on fire early on Friday after an attack by Russian troops, the mayor of the nearby town of Energodar, where the plant’s workers live, said in an online post.

The Associated Press reported an unnamed Ukrainian government official as saying elevated radiation levels had been detected near the plant. A US official, however, said the latest information does not indicate elevated radiation levels. 

The fire reportedly broke out in a training building outside the plant’s perimeter after Russian troops attacked. 

US President Joe Biden spoke with a nuclear security official at the US Energy Department to receive an update on the situation at the plant, the White House said. Biden also reportedly spoke with Ukrainian President Volodymr Zelensky on Thursday evening.