President Vladimir Putin said Russia was facing “treachery” as Wagner militia group leader Yevgeny Prigozhin started an “attempt at an armed mutiny.” In response, Prigozhin, a former close ally of Putin, said he wouldn’t surrender.

In a sudden and dramatic escalation of the long-running feud between the mercenary leader and Russia’s defense establishment, Prigozhin’s group allegedly took over military offices in the Russian city of Rostov-on-Don, where the defense ministry’s southern military district headquarters are located. Putin threatened the group with “harsh” consequences in a televised address lasting about five minutes.

The unfolding events are the biggest sign of revolt against Putin since he started a war against Ukraine in February of last year, and arguably the biggest challenge to his decades-long leadership.

Latest Coverage

• Putin Denounces Wagner ‘Treason’ as Feud Erupts Into Revolt
• Prigozhin Says Wagner Won’t Surrender After Putin’s Address
• Prigozhin Accused of Armed Mutiny in Challenge to Kremlin’s Grip
• Raw But Ready to Fight: Ukraine Sends National Guard to Front

UK, Allies Expected to Discuss Events Later Today (1 p.m.)

The UK government’s emergency committee, Cobra, is meeting to discuss events in Russia, the BBC reported, with Prime Minister Rishi Sunak expected to speak with allies later.

Zelenskiy Says Events in Russia Disclose ‘Full-Scale Weakness’ (12:15 p.m.)

Ukrainian President Volodymyr Zelenskiy said Russia has used “propaganda to mask its weakness and the stupidity of its government,” according to a Twitter post.

The latest events are a sign of “full-scale weakness” in Russia, he added in his first public comments on overnight events. “Ukraine is able to protect Europe from the spread of Russian evil and chaos,” Zelenskiy added.

Prigozhin Says Wagner Won’t Surrender (11:40 a.m.)

The Wagner paramilitary group won’t surrender to demands from Putin or the security services, Yevgeny Prigozhin, Wagner’s owner, says in audio message in his Telegram channel.

Putin Speaks With Allies in Belarus, Kazakhstan (11 a.m.)

Russia’s president called his close ally, Belarusian President Alexander Lukashenko, to inform him of the situation, the state-owned Belta news agency reported.

Putin also held a phone call with his Kazakh counterpart Kassym-Zhomart Tokayev, briefing him on the situation in the country, Tokayev’s press-service said. Tokayev noted that “the current events are Russia’s internal affair.”

European Leaders Monitoring the Situation (10:30 a.m.)

Charles Michel, European Council president, said he’s in touch with European leaders and Group of Seven partners about what “is clearly an internal Russian issue.”

Italian Prime Minister Giorgia Meloni said the Russian situation “should not distract Italy and the EU from its determination to support Ukraine.”

Estonia and Poland are among the countries saying their leaders are following developments and exchanging information with allies. Prime Minister Kaja Kallas urged Estonians not to travel to any part of Russia and said border security had been strengthened.

Russian State Faces ‘Most Significant Challenge,’ UK Says (10 a.m.)

Reflecting on the evolving situation in Russia, the UK defense ministry said that the loyalty of Russia’s security forces, and especially its National Guard, “will be key to how the crisis plays out.”

“This represents the most significant challenge to the Russian state in recent times,” the ministry said in a regular intelligence update on Twitter.

Three Dead in Kyiv After Latest Russian Missile Barrage (8 a.m.)

While drama unfolded from Moscow to Rostov-on-Don, Kremlin forces kept up their bombardment of Ukraine overnight.

Russia launched 51 missiles and two Shahed drones at Ukraine including two cruise Kaliber missiles, Ukrainian army chief Valeriy Zaluzhnyi said on Telegram. Air defense intercepted 40 cruise missiles, one Kaliber and both drones.

At least three people were reported killed and 10 or more injured by debris from a missile early Saturday in Kyiv that struck a multi-story apartment building. Explosions were also heard in Kharkiv in the northeast.

‘Counter-Terror Regime’ Declared in Moscow: IFX (8 a.m.)

A counter-terrorist operation regime was declared in Moscow, the Moscow region and the Voronezh region amid the “armed uprising” of the Wagner private military company, Interfax reported, citing the National Anti-Terrorist Committee.

Prigozhin Says Wagner Controls Rostov-on-Don (6:40 a.m.)

Prigozhin said in a new video that he and his fighters had entered Rostov-on-Don, a southern Russian city close to the border with Ukraine. The claim couldn’t be independently confirmed.

Social media carried videos from the city showing armored vehicles and troops surrounding military headquarters and security buildings without firing their weapons but it wasn’t immediately clear if they were from Wagner or the Russian army. The videos couldn’t immediately be authenticated. Local officials told residents to avoid the center of the city, citing the “existing situation.”