The United States on Thursday announced a new security package for Ukraine worth $225 million, which includes a Patriot missile battery, additional ammunition for high-mobility artillery rocket systems and missiles, among other items.

Washington, Ukraine's biggest supporter, has provided more than $50 billion in military aid since 2022 when the Russian invasion began. But U.S. military aid was delayed in Congress for months over the winter, and Ukrainian President Volodymyr Zelenskiy said a shortage of weapons was giving Russia the upper hand.

After battle lines remained largely frozen since early in the conflict, Moscow made some advances in eastern Ukraine in recent months. Zelenskiy has urged Western governments to increase and speed up military aid to Kyiv's forces. U.S. legislation was approved in April that provided $61 billion in funding to Ukraine.