Counterintelligence officers of the Security Service of Ukraine (SBU) have detained an agent of Russia's Federal Security Service (FSB) in the Dnipropetrovsk region, accused of directing attacks on Nikopol.

A record number of people in Estonia were detained last year for assisting Russian special services, with a Ukrainian military psychologist outlining the typical online recruitment methods used by the Federal Security Service (FSB).

Russia's Federal Security Service (FSB) announced on Thursday the arrest of a journalist, who previously worked for the US-funded Radio Free Europe (RFE), on suspicion of assisting Ukraine in preparing cyberattacks.

Russia's Federal Security Service (FSB) announced it had thwarted a plot to assassinate a senior law enforcement official. The alleged assassination attempt involved a bomb hidden in an electric scooter.

Moscow's Federal Security Service (FSB), police, and National Guard have been placed on heightened alert following intelligence about a potential sabotage attack from Ukraine.

The head of Russia's Federal Security Service (FSB) stated that over 2,500 'terrorists' have been killed in the North Caucasus since 2006, claiming the insurgent underground has been 'almost completely eliminated'.

Russian troops fighting in Ukraine have been advised to stop using Max — the Kremlin-backed “national messenger” app designed to replace Telegram — because it is not secure enough, the independent outlet Mediazona reports. The guidance comes as federal authorities have been throttling Telegram since summer 2025, triggering a backlash from pro-war commentators who say the app remains soldiers’ most reliable means of frontline communication. The Federal Security Service (FSB) has warned separat...

The Security Service of Ukraine (SSU) detained a Russian Federal Security Service (FSB) agent in Kyiv who was organizing arsons of military vehicles belonging to defense forces.

Russia's Federal Security Service (FSB) announced the detention of three individuals, including a Moldovan citizen, suspected of preparing a terrorist attack in Moscow targeting a high-ranking official.

Russia's Federal Security Service (FSB) has arrested Alexander Andreyev, a former reporter for Radio Liberty, in the country's Far East.

Russia's Federal Security Service (FSB), the successor to the KGB, is reportedly expanding its power and influence within Vladimir Putin's Russia.

Russia's Federal Security Service (FSB), police, and national guard in Moscow have been placed on higher alert following intelligence reports of a potential sabotage attack from Ukraine.

Counterintelligence officers of the Security Service of Ukraine (SBU) detained a Russian agent in Kropyvnytskyi who, on orders from Russia's Federal Security Service (FSB), was registering Starlink satellite terminals under other people's identities.

Russia's Federal Security Service (FSB) claims that Ukrainian forces are capable of accessing sensitive front-line data through the Telegram messaging application.

Russia's Federal Security Service (FSB) and Investigative Committee have charged three Russian citizens for using Telegram channels to manipulate securities on the Moscow Exchange. The FSB stated it had disrupted their activities.

Russia's Federal Security Service (FSB) has announced the detention of a Chita resident on suspicion of treason. The suspect has been identified as a former freelance correspondent for RFE/RL's Russian service.

The Sverdlovsk branch of Russia's Federal Security Service (FSB) reportedly ran Telegram advertisements offering 'easy money' for acts of sabotage, which the agency later described as a 'social experiment.'

Military counterintelligence officers and investigators of the Security Service of Ukraine (SBU), with the assistance of the Commander-in-Chief of the Ukrainian Armed Forces, have exposed an agent of Russia's Federal Security Service (FSB).

Russian dictator Vladimir Putin has given the Federal Security Service (FSB) full authority to suppress any dissent ahead of the Russian State Duma elections scheduled for September 2026.

Russia's Federal Security Service (FSB) has announced a breakdown in talks with Telegram founder Pavel Durov, accusing the messaging platform of enabling terrorism and child exploitation.