Russia’s takeover of Europe's largest nuclear power plant in Ukraine should spur companies and policymakers to be more careful in plans to build reactors to fight climate change, nuclear safety experts said Friday.

Russian forces seized the Zaporizhzhia nuclear power plant in Ukraine on Friday after heavy fighting sparked a huge blaze in a training building at the site. The fire was extinguished and officials said the facility was safe.

But seizure of the reactor, a week after Russian troops took over Ukraine's defunct but still radioactive Chernobyl plant, triggered global alarm about vulnerabilities of nuclear energy to wartime attacks that could unleash deadly radiation.