Poland says it has stopped supplying weapons to Ukraine, further escalating a dispute over grain shipments that’s threatening to break a key alliance in Kyiv’s fight against Russia.

"We are no longer transferring weapons to Ukraine, because we are now arming Poland with more modern weapons,” Prime Minister Mateusz Morawiecki said Wednesday in an interview with Polsat television, in response to a question from a reporter on whether Warsaw would continue to support Kyiv despite the grain-exports disagreement.

He said his government has no intention to "risk the security of Ukraine” and won’t interfere with arms shipments from other countries through the military hub that’s grown up in the town of Rzeszow. He noted that Poland is also benefiting financially from the transit.