KYIV, Feb 5 (Reuters) - Ukraine is set to replace Defence Minister Oleksii Reznikov with the chief of its military spy agency, a close ally of President Volodymyr Zelenskiy said on Sunday, in a reshuffle at the forefront of Ukraine's war campaign. Reznikov, who had said earlier on Sunday that any decision on a reshuffle was up to Zelenskiy, told the Ukrainian Fakty ICTV online media later in the evening that the transfer to the new ministry was news to him. Reznikov hosted a news conference on Sunday afternoon, in which he said Ukraine expected a possible major Russian offensive this month, but that Kyiv had the resources at hand to hold them at bay