The US will not send Ukraine rocket systems that can reach into Russia, President Joe Biden said on Monday, as Ukraine pushes for longer-range weapons systems to help in its fight.
"We're not going to send to Ukraine rocket systems that strike into Russia," Mr Biden told reporters after arriving back at the White House after a weekend in Delaware.
Mr Biden did not rule out providing any specific weapons system, but instead appeared to be placing conditions on how they could be used.
Dmitry Medvedev, the deputy head of Russia’s Security Council, said that it was a “reasonable” decision.
He said that “otherwise, if our cities come under attack, the Russian armed forces would fulfil (their) threat and strike the centres where such criminal decisions are made.”
Mr Medvedev added that “some of them aren’t in Kyiv" and said that “there is no need for a further explanation.”
Mr Biden and his team are working on a new package of military equipment and it is expected to be announced in coming days.
The MLRS was under consideration, but nothing with long-range strike capabilities outside of battlefield use, a senior administration official said.
The Ukrainian government has urged the West to provide it with more longer-range weapons to turn the tide in the war, now in its fourth month.
Mr Biden wants to help Ukraine to defend itself, but has been opposed to providing weapons that Ukraine could use to attack Russia.
CNN and The Washington Post reported on Friday the Biden administration was leaning towards sending the MLRS and another system, the High Mobility Artillery Rocket System, known as HIMARS, as part of a forthcoming military aid package.
Mr Biden's administration and US allies have been increasingly willing to give Ukraine longer-range weaponry, including M777 howitzers, as Kyiv battles Russian forces with more success than intelligence officials had predicted.
But US intelligence has also warned about growing risks, particularly given a mismatch between Russian President Vladimir Putin's apparent ambitions and the performance of his military.
Ukraine has started receiving Harpoon anti-ship missiles from Denmark and self-propelled howitzers from the US, Ukrainian Defence Minister Oleksiy Reznikov said on Saturday.