Ukraine says Russia is planning a major ground offensive for the new year.
President Volodymyr Zelensky and other senior officials have warned that Kyiv and its allies must guard against complacency despite Western analysts claiming that Russia's ability to conduct successful offensive ground operations is rapidly diminishing.
In a series of media briefings, Ukraine's Defence Minister Oleksii Reznikov said that evidence was mounting that Moscow is planning a broad new offensive for early 2023.
He speculated that this could happen in February when half of the 300,000 troops conscripted by The Kremlin in October will have completed their training.
Reznikov told the Guardian newspaper: "The second part of the mobilisation, 150,000 approximately... do a minimum of three months to prepare. It means that they are trying to start the next wave of the offensive probably in February, like last year. That's their plan.
"The Kremlin is trying to find new solutions (for) how to get the victory."
General Valery Zaluzhny, the head of Ukraine's armed forces, is expecting Russian troops to launch another assault on Kyiv in the coming months.
He said: "The Russians are preparing some 200,000 fresh troops. I have no doubt they will have another go at Kyiv."
Zaluzhny warned that the nation has the "very important strategic task" of preparing for the fresh Russian attack.
He said: "(Ukraine has) to create reserves and prepare for the war, which may take place in February, at best in March, and at worst at the end of January."