He made the statement after The New York Times reported in recent days that US intelligence warned the White House about Russia's plan to smuggle incendiary devices onto cargo planes heading to the United States.
The White House warned the Kremlin to stop the operation, according to the NYT.
'Acts of air terror'
Speaking at a news conference in Warsaw on Wednesday, alongside visiting Ukrainian President Volodymyr Zelensky, Tusk said he could "confirm that Russia was planning acts of air terror, not only against Poland, but against airlines around the world."
He told reporters that Poland has played a key role in Europe in responding to "sabotage and diversionary acts" orchestrated by Russia against various countries.
"Some of the sabotage acts or preparations for diversion were very dramatic in nature," Tusk said, without providing details.
Kremlin denies 'unfounded allegations'
Kremlin spokesman Dmitry Peskov responded by saying that "Poland is well known for such unfounded allegations."
He added, as quoted by Russian news agencies: "It often tries to be a leader in this area compared to other European countries."
'Placing explosives in parcels,' arson attacks: Polish interior minister
Poland's Interior Minister Tomasz Siemoniak said on Thursday that the suspected "acts of air terror" involved "placing explosives in parcels, which were then sent by courier companies, including by air, with the risk of an explosion occurring on the plane carrying these packages."
Siemoniak told public broadcaster Polish Radio that there was "no doubt that such actions were carried out at the behest of Russian services."
When asked if any such incident occurred on a plane flying to Poland, he replied: "I will not say anything more on the matter. It did not happen in a factual sense, because we would all have known about it. However, the actions of Russian services created such a threat."
Siemoniak confirmed reports that Polish and Western intelligence agencies thwarted "a Russian aggression plan" that included preparations for terrorist attacks and sabotage, such as setting fires to facilities.
He added that "these actions were part of a broader international plan by Russia, involving many countries, not just Poland."
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Source: Radio Poland/IAR/KPRM/X/@Independent, politico.eu, euronews.com
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