The US has not seen anything that contradicts Poland's preliminary assessment that a Russian-made missile which landed within its borders on Tuesday was most likely the result of a Ukrainian air defence missile, said the United States Secretary of Defence.
The current situation in Ukraine, the presence of US troops in Poland and Polish-US defence cooperation were the main subjects of a phone conversation between the Polish deputy PM and defence minister and the US defence secretary.
The US defence secretary has said that Nato will stand by Poland if Russia decides to attack.
The Polish defence minister and his US equivalent have discussed speeding up the delivery of US defence equipment to Poland.
The US should establish permanent military bases on the eastern Nato flank, including in Poland, Romania and the Baltic states, General Mark Milley, chairman of the Joint Chiefs of Staff, told the US House of Representatives' armed forces committee on Tuesday.
The Presidents of Poland and the US, Andrzej Duda and Joe Biden, are holding face-to-face talks on the war in Ukraine, in Warsaw on Saturday.
US President Joe Biden, who is on a two-day visit to Poland, met with soldiers of the elite 82nd Airborne Division in Rzeszów, south-eastern Poland on Friday.
President Andrzej Duda met on Friday in Warsaw with visiting US Defense Secretary Lloyd Austin for talks on enhancing bilateral cooperation in security amid Russia's actions jeopardising peace in Central and Eastern Europe.
Almost 5,000 soldiers from America's 82nd Airborne Division will join US troops already in Poland and will be stationed in the country's southeast along with British soldiers, the defence minister has announced.
The United States will send 3,000 additional troops to Poland in the coming days as fears of a Russian invasion of Ukraine grow, the US defence department has announced as quoted by several news agencies.