Vienna: Owing to Russian troops bombing on Chernobyl nuclear power plant, the power plant is no longer transmitting data to the International Atomic Energy Agency (IAEA).

UN Atomic Energy chief Rafael Grossi said that the defunct Chernobyl nuclear plant is not sending transmitting data. Now Russian troops have deployed their staff at the Ukrainian facility.

On February 24, Russia launched a full-scale war on and seized the defunct nuclear plant in Chernobyl, the site of a 1986 disaster, killed hundreds and spread radioactive contamination across Europe.

The remote data transmission from safeguards monitoring systems installed at the Chornobyl NPP had been lost", International Atomic Energy Agency chief Rafael Grossi said.

"The Agency is looking into the status of safeguards monitoring systems in other locations in Ukraine and will provide further information soon," it said.

The IAEA uses the term "safeguards" to describe technical measures it applies to nuclear material and activities, intending to deter the spread of nuclear weapons through early detection of the misuse of such material.

More than 200 technical staff and guards remain trapped at the site, working 13 days straight since the Russian takeover, NDTV reported.

The defunct plant sits inside an exclusion zone that houses decommissioned reactors as well as radioactive waste facilities.

More than 2,000 staff still work at the plant as it requires constant management to prevent another nuclear disaster.

The UN atomic energy agency has urged Russia to allow workers to rotate because rest and regular shifts were crucial to the site's safety.

"I'm deeply concerned about the difficult and stressful situation facing staff at the Chornobyl nuclear power plant and the potential risks this entails for nuclear safety," said Grossi.

"I call on the forces in effective control of the site to urgently facilitate the safe rotation of personnel there.", he added.

With remote data transmission cut off and the Ukrainian regulator only able to contact the plant by email, Grossi reiterated his offer to travel to the site or elsewhere to secure "the commitment to the safety and security" of Ukraine's power plants from all parties.

Russia also attacked and seized Europe's largest atomic power plant, Zaporizhzhia, last week, drawing accusations of "nuclear terror" from Kyiv.

"Currently, the plant is operating as normal. The management of the site is fulfilling its functions. The situation is fully controlled by the Russian national guard," NDTV report stated.