Mikhail Gorbachev was president of the Soviet Union from 1985 to 1991.
(CNN) --
Mikhail Gorbachev, the last president of the Soviet Union before its dissolution, has died in Moscow at the age of 91, according to official statements.
Gorbachev, whose tumultuous rule was associated with the terms of perestroika and glasnost (restructuring and opening), has died after a long illness, according to official Russian news agencies.
The life and career of Mikhail Gorbachev, in facts
"Mikhail Sergeevich Gorbachev died tonight after a serious and prolonged illness," the Central Clinical Hospital reported, according to RIA/Novosti on Tuesday.
(Both RIA/Novosti and TASS note that Gorbachev died at the age of 92. However, he was born on March 2, 1931.)
Developing note.
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