Aman Tuleyev, the longtime governor of Russia's Kemerovo region where a huge mall fire killed at least 64 people including 41 children last weekend, resigned on Sunday.
"I submitted my resignation letter to the Russian president," he said in a three-minute video address released by his office.
Tuleyev, who had been at the helm of the key coal-mining region since 1997, said he could no longer remain at his post with "such a heavy burden" and added that his resignation was "the only right choice".
At least 64 people - including 41 children - died when a huge fire ravaged a mall in the industrial city of Kemerovo in western Siberia last Sunday.
