WARSAW, Sep 20 (AFP) - Poland will no longer arm Ukraine to focus on its own defence, the Polish prime minister said on Wednesday, a few hours after Warsaw summoned Kyiv's ambassador amid a row over grain exports.

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