U.S. President Joe Biden landed in the Polish capital Warsaw on Monday evening, Polish television footage showed, after making a surprise visit to Ukraine.

Biden is scheduled to meet with his Polish counterpart Andrzej Duda on Tuesday to discuss the U.S.'s cooperation with Poland and efforts to support Ukraine and NATO.

Earlier in the day during his visit to Kyiv, Biden announced the U.S. would be providing $500 million in additional military aid to Ukraine, promising to stand with Ukraine as long as it takes.