The 2010 Polish presidential plane crash in Smolensk, Russia, that killed 96 people including the president, was a result of "an act of unlawful interference", said Antoni Macierewicz, head of a special sub-committee investigating the cause of the air disaster.
President Andrzej Duda's meeting with US President Joe Biden in the south-eastern town of Rzeszów has been delayed owing to Duda's plane having to turn back to Warsaw.
A so-called air bridge was being prepared by Poland and its German partners for refugees from war-torn Ukraine who want to reach specific countries, the minister of infrastructure said on Wednesday.
As Putin prepares siege on Kyiv, Bartosz Cichocki, who is the only western ambassador to stay in the Ukrainian capital, warned ‘hundreds will die’ without the necessary help.
The US secretary of state has said that the United States is considering sending planes to Poland if Warsaw decides to supply combat aircraft to Ukraine, Reuters reported on Sunday.
The Polish government spokesman has denied reports that Poand was sending its Soviet-era MiG fighter aircraft to Ukraine.
Mateusz Morawiecki, the Polish prime minister, has announced Poland will close its airspace to Russian airlines owing to Russia's invasion of Ukraine.
A plane carrying the first US soldiers landed in Jasionka near Rzeszow in southern Poland on Saturday as part of the West's reaction to Russia's aggressive stance towards Ukraine.
More US planes are landing in Poland in preparation for the imminent arrival of US forces, including troops from the renowned 82nd US Airborne Division, Defence Minister Mariusz Blaszczak, said on Friday.
Air travel within Polish airspace is picking up but it is still below the level recorded before the coronavirus pandemic, figures released by the Polish Air Navigation Services Agency (PAZP) have shown.