After the 1986 Chernobyl disaster, the Soviet government kept the news secret for almost three days. A KGB memo from July 28, 1986 explicitly forbade publishing information about 'the radiation situation,' 'contamination,' and 'radioactive contamination exceeding permissible concentrations.' The official death count remained at 31. A 2006 Greenpeace report estimated up to 93,000 deaths. Ukrainian security services later revealed the Soviets knew about dangerous plant conditions years before, with radiation releases in 1982 and 1984 that were never disclosed.