This came days after Morawiecki announced, "We are no longer transferring weapons to Ukraine because we are now arming Poland with more modern weapons." 

Zelensky had during his UN address to the general assembly in New York blasted the "political theatre" around grain imports. It was seen as a swipe at Warsaw, given he was chastising those who Ukraine sees as helping the Russian cause. The spat was very bad timing for Zelensky given he's currently in North America to rally the US and Canada behind staying the course in supporting Kiev - meaning more money, and more advanced weapons.

And the Ukrainian leader had more to say in Canada where he met with PM Justin Trudeau and spoke before the House of Commons: 

"You help either Ukraine or Russia. There will be no mediators in this war. By weakening assistance to Ukraine, you will strengthen Russia."

"And a powerful Russia and what to expect from it… I think history in books and witnesses has long since answered this question. If someone wants to take a risk, fine, weaken assistance to Ukrainians," he said, according to a statement posted on the Ukrainian president's website.