Wikipedia on the 1993 Russian constitutional crisis.
In September and October 1993, a constitutional crisis arose in the Russian Federation from a conflict between the then Russian president Boris Yeltsin and the country’s parliament. Yeltsin performed a self-coup, dissolving parliament and instituting a presidential rule by decree system. The crisis ended with Yeltsin using military force to attack Moscow’s House of Soviets and arrest the lawmakers. In Russia, the events are known as the “October Coup” or “Black October”.
The Foreign Intelligence Service[a] (SVR) is the civilian foreign intelligence agency of Russia. The SVR succeeded the First Chief Directorate of the KGB in December 1991.
Unlike the Russian Federal Security Service (FSB), the SVR is tasked with intelligence and espionage activities outside the Russian Federation. A small service, it works collaboratively with its military intelligence counterpart, the Main Intelligence Directorate, better known as the GRU.