The US is planning to send Patriot air defence missiles to Ukraine, said US media reports.
President Joe Biden is supposed to announce the new decision this week, according to unnamed officials, reports BBC.
As Russian attacks have continued to kill civilians and cause major blackouts, Ukraine has been requesting further air defence support for some time.
Patriot is one of the most advanced US air defence systems but supplies to Ukraine are likely to be limited.
It is not known how many of the batteries will be sent to Ukraine.
Once the move is approved, the systems are likely to be sent over in the coming days, with Ukrainian soldiers trained to use them at a US Army base in Grafenwoehr, Germany, the officials said.
The Patriot system would be a legitimate target for Russian strikes, the Kremlin said on Wednesday.
The news came as explosions rocked the Ukrainian capital Kyiv, in the latest of a steady stream of attacks by Russia.
Moscow has repeatedly targeted Ukrainian energy infrastructure since October.
Bd-pratidin English/Lutful Hoque
