Russian soldiers who seized the site of the Chernobyl nuclear disaster drove their armored vehicles without radiation protection through a highly toxic zone called the ¡°Red Forest,¡± kicking up clouds of radioactive dust, workers at the site said.

The two sources said soldiers in the convoy did not use any anti-radiation gear. The second Chernobyl employee said that was ¡°suicidal¡± for the soldiers because the radioactive dust they inhaled was likely to cause internal radiation in their bodies.

Ukraine¡¯s state nuclear inspectorate said on Feb. 25 there had been an increase in radiation levels at Chernobyl as a result of heavy military vehicles disturbing the soil. But until now, details of exactly what happened had not emerged.