Kamala Harris travels to Warsaw on Wednesday to assess ways to provide “military assistance” to Ukraine, coinciding with the controversy provoked by Poland after offering its fighter jets.

Harris trip was planned before Poland surprised the United States on Tuesday by offering its Mig-29 aircraft to Ukraine. The vice president is scheduled to meet with Polish President Andrzej Duda and Prime Minister Mateusz Morawiecki, according to U.S. sources.

Harris also plans to travel to Romania to arrange the next steps to respond to the Russian invasion in Ukraine, the statement reads. “They will discuss our continuing support for the people of Ukraine through security, economic, and humanitarian assistance and our determination to impose severe economic consequences on Russia and those complicit in Russia’s invasion,” the text continues.