Poland's prime minister indicated that the nation is gearing up for multiple possible developments, emphasizing that the next few months could be decisive in light of the Russian threat.

Donald Tusk responded to media accounts, based on American intelligence, suggesting Moscow intends an armed provocation in Poland aimed at gauging Nato's commitment.

"I do not wish to alarm people, yet the coming months may indeed be pivotal, partly because of shifts in the conflict's character. Such worries are especially evident in the Baltic nations," Tusk stated to journalists on Friday.

Polish news outlet Onet reported that sources close to President Karol Nawrocki had said the US had issued several warnings to Warsaw about a plot to attack the country.

The White House and US State Department did not respond to the BBC's requests for comment.

Under the purported plans, also published by the Telegraph in the UK on Friday, Polish infrastructure could be targeted by missiles or drones, or soldiers could be sent into the Nato state.

The reports suggest the aim would be to place pressure on Ukraine's western allies to suspend aid to the country as it continues to fight against Russia's full-scale invasion, launched in 2022.

Asked about the reports, Tusk said: "Let's not be afraid, we are preparing for various situations, but we cannot ignore them... We are aware of the threats, also thanks to information from our allies."

Nawrocki is set to attend a Nato summit with leaders of other members of the defensive alliance in Turkey next week.

Secretary General Mark Rutte has said the gathering will show Europeans are heeding US President Donald Trump's longstanding calls to increase their defence spending, while leaders are also expected to pledge to continue funding weapons for Ukraine.

Tusk told the Financial Times in April that Russia could attack a Nato member state in "months".

In late June, his Deputy Prime Minister Radek Sikorski told CBS News that he would not rule out a Russian "false flag" operation in the next two years to justify an attack on a Nato state.

Baltic states have previously acknowledged concerns over their vulnerability to a Russian attack. Latvian media reported in June that its intelligence services had warned Moscow was planning military provocations in the region, or in Poland.

Lithuania's ambassador to Nato said on Thursday that Russia was more likely to resort to hybrid warfare - such as missile or drone incursions - than a conventional military attack, according to the country's public service broadcaster LRT.

Nato's Article 5 states that an armed attack against one member will be considered an attack against all, for which they will come to each other's defence.