The Chernobyl Nuclear Power Plant is no longer transmitting data from its “safeguards monitoring system” nearly two weeks after it was taken over by Russian forces in Ukraine, the United Nations’s nuclear watchdog said Tuesday.

International Atomic Energy Agency Director General Rafael Mariano Grossi issued a statement on Tuesday on the loss of remote data transmission from safeguards monitoring systems at the Chernobyl facility. The safeguards monitoring systems verify that nuclear facilities are not misused and nuclear material is not diverted from peaceful uses, according to the IAEA. The watchdog group is looking into the status of safeguards monitoring systems in other locations in Ukraine and will provide an update soon, Grossi said.