“We have been very clear with the Ukrainians privately – we’ve certainly been clear publicly – that we do not support attacks inside Russia. We do not enable and we do not encourage attacks inside Russia,” said National Security Council spokesman John Kirby.
The US war department said the latest shipments will bring the total value of US security assistance to Ukraine to $37.6bn since Russia’s February 2022 launch of the special military operation.
“The United States will continue to work with its allies and partners to provide Ukraine with capabilities to meet its immediate battlefield needs and longer-term security assistance requirements,” the Pentagon said in a statement.
The United States has been leading an unprecedented effort by NATO and other allied countries to supply Ukraine with weaponry and other aid.
The latest arms shipments come after a spate of attacks made in shadowy circumstances on targets inside Russia itself, including an unprecedented barrage of drone attacks on Moscow.
Kirby said the United States has laid out its ground rules to Ukraine.
“We don’t tell them where to strike. We don’t tell them where not to strike,” he said. “Ultimately, President Zelensky and his military commanders decide what they’re going to do.”
However, “we certainly don’t want to see attacks inside Russia that are being propagated, that are being conducted, using US-supplied equipment.”
Kirby claimed that despite the growing tensions over the issue, the White House remains confident that Ukraine will keep its promise not to use US-built F-16 warplanes – set to be supplied by European countries – against targets beyond Ukrainian borders.
“We have gotten that assurance at various levels,” Kirby said.
The Pentagon said the $300m package includes munitions for Patriot aerial systems, Aim-7 air missiles, Avenger air systems and Stinger anti-aircraft missiles.
Also part of the package is ammunition for High Mobility Artillery Rocket Systems [HIMARS], 155mm and 105mm artillery rounds, 105mm tank ammunition and Zuni aircraft rockets.
The United States is also sending more than 30m rounds of small arms ammunition to Ukraine, the Pentagon said.