International sports federations should either move or cancel sports events currently planned in Russia or Belarus, urges the International Olympic Committee.
Russian troops have invaded Ukraine through Belarus, amid claims they are now using an airfield in Belarus to line up troops to assault the capital of Kyiv.
"The executive board of the International Olympic Committee reiterated today the IOC's strong condemnation of the breach of the Olympic Truce by the Russian Government and the Government of Belarus through its support in this," says the IOC.
The Olympic body says international sports federations "should take the breach of the Olympic Truce by the Russian and Belarusian governments into account, and give the safety and security of the athletes absolute priority."
The IOC executive also says Russian and Belarusian national flags should not be displayed at international sports events.
Russian athletes at the Beijing Winter Games did not compete under their flag and their anthem was not played at any ceremonies, after sanctions imposed for the widespread doping across many sports, exposed after the 2014 Sochi Games.
Grand Prix cancelled
Formula One has already removed the Russian Grand Prix from its schedule, after Russia's invasion of Ukraine.
The organisation has made the announcement, insisting: "It is impossible to hold the Russian Grand Prix in the current circumstances."
The race was scheduled for September 25 at Sochi.
"We are watching the developments in Ukraine with sadness and shock, and hope for a swift and peaceful resolution to the present situation," says Formula One.
Four-time Formula 1 champion Sebastian Vettel claimed he would not drive in a race in Russia, while reigning champion Max Verstappen also expressed doubts.
"When a country is at war, it's not correct to race there, that's for sure," he said.
The Formula One season begins March 20, with the Bahrain Grand Prix.
League Final moved
Meanwhile, UEFA has moved this year's Champions League final from St Petersburg to Paris, stating home games of Ukrainian and Russian teams in UEFA competitions would be played at neutral venues "until further notice".
The governing body has thanked French President Emmanuel Macron for his "personal support and commitment" in taking on the final, adding it would "fully support multi-stakeholder efforts to ensure the provision of rescue for football players and their families in Ukraine, who face dire human suffering, destruction and displacement".
The Champions League final was scheduled for Zenit St Petersburg's stadium on May 28, with thousands of supporters from across the continent expected to attend the European club soccer showcase.
"It's a shame that such a decision has been made," says Kremlin spokesman Dmitry Peskov. "St Petersburg could have provided all favourable conditions to hold this festival of soccer."
Thomas Tuchel, the German manager of Champions League champions Chelsea - owned by Russian Roman Abramovich - agrees with the decision.
"Yes, a clear yes," he says. "Sadly, I think it's the worst reason to change a location - the absolutely worst reason.
"We feel horrible about it in general, it clouds our minds and our focus. We understand the decision."
UK Culture Secretary Nadine Dorries, who is responsible for sport, says the decision is justified.
"Russia must not be allowed to exploit sporting and cultural events on the world stage to legitimise its unprovoked, premeditated and needless attack against a sovereign democratic state," she says.
The St Petersburg stadium is known as the Gazprom Stadium, after a sponsorship deal with Russia's state energy company, which also sponsors the Champions League and UEFA's Euro 2024 national team competition.
The move to strip St Petersburg of the final follows calls from European lawmakers to change the venue and stop considering Russian cities for major international soccer competitions.
The lawmakers also asked UEFA to end Gazprom's sponsorship of the continent's elite club competition, but UEFA's announcement makes no mention of Gazprom.
Russian Football Union (RFU) president Alexander Dyukov, who also serves on the UEFA executive and is chief executive of Gazprom subsidiary Gazprom Neft, has criticised the UEFA move.
"We believe that the decision to move the venue of the Champions League final was dictated by political reasons," he says. "The RFU has always adhered to the principle of 'sport is out of politics' and thus cannot support this decision.
"The RFU also does not support the decision to transfer any matches involving Russian teams to neutral territory, as violating the sports principle and infringing on the interests of players, coaches and fans," he adds.
The 2023 Champions League final will be contested at Istanbul, with London's Wembley hosting the following year and Munich's Allianz Arena the venue for the 2025 final.
Reuters
