Ukraine will receive missiles for advanced air defence systems and rocket launchers in the first batch of weapons being sent under a new funding program agreed by the US and Ukraine's European allies, President Volodymyr Zelenskiy says.

Ukraine has so far secured more than $US2 billion ($A3 billion) in financing for US-produced weapons via a NATO-led mechanism called the Prioritised Ukraine Requirements List (PURL), according to Zelenskiy.

He said he expected the total committed funds to reach $US3.5 billion ($A5.3 billion) in October.

NATO allies hope to provide $US10 billion ($A15 billion) in arms for Ukraine.

The first two batches, worth $US500 million ($A750 million) each, will "definitely include missiles for Patriot and HIMARS", Zelenskiy said, referring to Patriot air defence sy

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