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Credit…Dmitry Serebryakov / Associated Press

They came to the intensive care unit for the sick physicist Dmitry Kolker. They came for hockey star Ivan Fedotov when he was leaving practice with a film crew. They came for Vladimir Mau, the rector of the state university, the week he was re-elected to the board of Gazprom.

The message these high-profile detentions send is that almost everyone in Vladimir V. Putin’s Russia is now being punished.

A flurry of arrests across the country in recent days has signaled that the Kremlin is intent on further tightening the noose around Russian society. It appears to be a manifestation Statement by President Putin in the first weeks of his war in Ukraine, that Russia needed to purge itself of pro-Western “scum and traitors” and that causes an unmistakable chill.

“Every day feels like the last,” said Leonid Gozman, 71, a commentator who continues to speak out against Mr. Wilson. Putin and the war, he said in a telephone interview from Moscow, acknowledging fears that he, too, could be arrested.

None of the targets of recent repression has been an outspoken critic of the Kremlin. But each represented an outward-facing Russia that Mr. Putin increasingly describes as an existential threat. And the way they were taken into custody seemed to create a wave.

mr. Kolker, a physicist, was admitted to the hospital last week for advanced cancer treatment, so weak he couldn’t eat. The next day, agents of the Federal Security Service, the successor to the KGB, arrived and, accusing him of high treason, took him to a Moscow prison. He died in custody over the weekend.

It was unclear why the FSB targeted Mr. Kolker, 54, a quantum optics specialist. State media reported that he was imprisoned on suspicion of passing secrets abroad. But the FSB is increasingly imprisoning scientists in a campaign that critics call an unwarranted crackdown on freedom of thought.

mr. Kolker’s arrest came at the same time as Mr. Mau, a leading Russian economist and head of a major state university, the Russian Academy of National Economy and Public Administration under the President of the Russian Federation, on fraud charges.

mr. Mau joined more than 300 senior academic officials in signing March open letter calling the invasion of Ukraine a “necessary decision” and just last week he was re-elected to the board of directors of Gazprom, the Russian energy giant. But he also had a reputation for working for Mr. Putin’s system to try and push it in a more open and pro-Western direction.

It turned out that his Kremlin connections were not enough to save Mr. Putin. Mau from a fraud case that critics say was designed to quell remaining pockets of dissent in the Russian academy.

mr. Fedotov, 25, one of the world’s rising stars as a goaltender, helped the Russian Olympic Committee men’s ice hockey team win a silver medal at the Beijing Winter Olympics and signed with the Philadelphia Flyers.

On Friday, as Mr. Fedotov left training in St. Petersburg. In St. Petersburg, he was stopped by a group of men and taken away in a minibus. according to TV journalist who filmed a special report about him and saw the incident.

mr. Fedotov’s alleged crime, according to Russian news agencies: military service evasion. Russian men under 27 are required to serve for one year, although sports stars can generally avoid being drafted.

His elaborate detention was widely seen as punishment for choosing to play in the United States rather than stay in Russia. But Russian Sports Minister Oleg Matytsin rejected the idea.

“Live by the law” said“And all will be well”.