UN Chief Antonio Guterres said he was deeply saddened by Gorbachev's passing and described him as a "one of a kind states-man, who changed the course of history.
European Commission president Ursula von der Leyen said Gorbachev's crucial role in bringing down the Iron Curtain opened the way for a free Europe.
And the foundation of then U-S president Ronald Reagan tweeted that Gorbachev was a man, who was once a political adversary, but who ended up becoming a friend.
