US President Joe Biden plans to give Ukraine advanced long-range missiles to help Kyiv with its ongoing counter-offensive, US media report.
They quote US officials familiar with the issue as saying Ukraine will get some ATACMS missiles with a range of up to 190 miles (300km).
This would enable Kyiv to hit Russian targets deep behind the front line.
At least two Ukrainian missiles hit the headquarters of Russia's Black Sea fleet in annexed Crimea on Friday.
A Ukrainian military source told the BBC that the attack in the port of Sevastopol used Storm Shadow missiles, which are supplied by Britain and France.
Such missiles have a range of just over 150 miles.