Fears are growing over nuclear safety at the Chernobyl nuclear plant as staff remain hostage, the head of an international watchdog said.
Rafael Mariano Grossi, director general of the International Atomic Energy Agency (IAEA) said there is no confirmation that power has been restored - and said authorities have to "move fast" to help the situation.
He told reporters: "This in safeguard terms isn't a good situation, we're losing information."
