WASHINGTON, April 19 (Reuters) - US President Joe Biden's administration announced US$325 million in new military aid for Ukraine on Wednesday (Apr 19) to help its military in its war against Russia, including additional ammunition for High Mobility Artillery Rocket Systems (HIMARS), advanced missiles and anti-tank mines.

It is the 36th security package for Ukraine since the Russian invasion in February 2022, and brings total US military assistance for the Kyiv government to more than US$35.4 billion in that time.

"This security assistance package includes more ammunition for US-provided HIMARS and artillery rounds, as well as anti-armor systems, small arms, logistics support vehicles, and maintenance support essential to strengthening Ukraine’s defenders on the battlefield," US Secretary of State Antony Blinken said in a statement.

HIMARS is a missile launcher mounted on a truck that can fire multiple guided missiles in quick succession. Missiles supplied to Ukraine have a range of up to 80km and Ukrainian forces have had great success using them to target Russian positions.

"Russia could end its war today. Until Russia does, the United States and our allies and partners will stand united with Ukraine for as long as it takes," said Blinken.

In addition to the HIMARS ammunition, the package includes artillery rounds; tube-launched, optically-tracked, wire-guided (TOW) missiles; anti-tank mines; port and harbor security equipment, and over 9 million rounds of small-arms ammunition, a Statement Department spokesperson said.

The package will be funded using Presidential Drawdown Authority, or PDA, which authorizes the president to transfer articles and services from US stocks without congressional approval during an emergency.