Ukraine has already received some MiG-29 Soviet-era fighter jets that Poland had promised to donate, its presidential office claimed on Monday.
The spokesman of the chancellery of the president of Poland, Marcin Przydacz, said in an interview with local radio station RMF FM that several Polish MiG-29s had already arrived in Ukraine.
"According to my information, this process has already been completed, that is, the transfer of this first part. Of course, there will be talks about possible further support," Mr Przydach added.
Earlier this year, Poland was the first country to pledge to deliver four MiG-29s to Ukraine.
Slovakia followed suit, having already delivered four out of 13 MiG-29 fighters to Ukraine’s armed forces.
The Ukrainian Air Force says that the delivery of Soviet jets will help Ukraine maintain its current capabilities, but that more modern aircraft are needed to turn the tide at the front.
Ukraine has long been pushing for being sent fighter jets, claiming that its current Soviet-era aircraft are not capable of countering offensives of Russian forces and are too old to be combat-effective.