Russia's deputy science minister, Pyotr Kucherenko, has died suddenly, aged just 46, after falling seriously ill on a flight to Moscow

Russia's deputy science minister, Pyotr Kucherenko, allegedly a private critic of the 'fascist' invasion of Ukraine, has died suddenly, aged just 46, after falling seriously ill on a flight to Moscow on Sat while he was returning from a business trip to Cuba.

Deputy Minister of Science and Higher Education Pyotr Kucherenko, 46, died on Saturday as he was returning from a government trip to Cuba, the ministry announced in a brief press release.

Kucherenko “became ill on the plane,” the ministry wrote, causing the plane to make an emergency stop in the Russian town of Mineralnye Vody.

There, “doctors tried to help, but they failed to save” the deputy minister, the release states. No other details were given. The ministry offered condolences to Kucherenko’s friends and family.

Kucherenko’s family said his death may have been from a heart condition but a forensic examination will be held on Wednesday, according to the state-run broadcaster Zvezda.

Speaking to reporters on Tuesday, Kremlin spokesperson Dmitry Peskov said he was not aware of Kucherenko’s cause of death.

Journalist Roman Super, who fled Russia shortly after it invaded Ukraine last February, said on his Telegram channel that he had spoken with Kucherenko “just days” before fleeing. He said Kucherenko feared for his safety and encouraged him to leave Russia.

According to state-run broadcaster Zvezda, Kucherenko’s family believes his death may be related to a heart condition, but an official forensic examination is set to take place on Wednesday. In a Telegram post published shortly after Kucherenko’s death, independent Russian journalist Roman Super shared details of a conversation he had with the deputy minister in early 2022.

Super fled Russia for security reasons, he claims, which Kucherenko encouraged him to do after Russia invaded Ukraine last February. Russia’s Deputy Minister of Science and Higher Education, Pyotr Kucherenko, 46, died while returning from a trip to Cuba on Saturday, according to the ministry.

“Kucherenko was feeling ill while on a plane with a Russian delegation that was returning from a business trip to Cuba. The plane landed in the city of Mineralnye Vody, where doctors tried to assist,” the ministry said in a statement posted on its website, adding that the minister could not be saved.

“Save yourself and your family. Leave as soon as possible. You cannot imagine the degree of brutalization of our state. In a year you won’t recognize Russia at all. By leaving you are doing the right thing,” Super quoted Kucherenko as saying.