The spies were suspected of being “involved in the invasion of Ukraine.” The massive and humiliating security blunder is the latest setback in Russia’s stumbling invasion. The Main Intelligence Directorate of Ukraine released information on 620 Russians who worked for the FSB spy agency and were “involved in criminal activities.” Many of the spies can be traced back to their work addresses, which are located at the FSB’s Lubyanka headquarters in Moscow.

Ukrainians have revealed the names leaked’s mobile phone numbers and car licence plates. Putin is a former KGB agent with strong ties to the FSB.

The information was obtained after Ukraine intercepted a phone call between two FSB agents.

The agents were talking about Major General Vitaly Gerasimov’s death.

This followed Russia’s destruction of 3G towers in Ukraine, which disrupted their own secure communications systems.

Moscow has failed to anticipate the opposition that Russian forces will face in Ukraine.

The announcement comes as Ukraine retakes one of the first towns to fall to Russian invaders.

Ukrainian soldiers recaptured the town of Trostianets, according to local reports, and tanks, lorries, and howitzers were seized in the area. The town is located 14 miles from the Russian border.

Moscow’s initial multi-front invasion plan has failed due to Ukraine’s tenacious resistance.