The U.S. will send about $225 million in military aid to Ukraine, U.S. officials said Thursday, in a new package that includes ammunition Kyiv’s forces could use to strike threats inside Russia to defend the city of Kharkiv from a heavy Russian assault.

The officials said the aid includes munitions for the High Mobility Artillery Rocket System, or HIMARS, as well as mortar systems and an array of artillery rounds. They spoke on condition of anonymity to discuss aid not yet publicly announced.

Under a new U.S. directive, Ukraine can use such weapons to strike across the border into Russia if forces there are attacking or preparing to attack. That change, however, does not alter U.S. policy that directs Ukraine not to use American-provided ATACMS or long-range missiles and other munitions to strike offensively inside Russia, according to U.S. officials.