US President Joe Biden is in the Ukrainian capital Kyiv on his first visit to the country since Russia’s invasion on 24 February last year.

In a statement from the White House, Mr Biden says he will announce “another delivery of critical equipment, including artillery ammunition” and added that later this week he will announce “additional sanctions” against elites and companies “that are trying to evade or backfill Russia’s war machine”.

Mr Zelenskyy says he and Mr Biden discussed long-range weapons, while Mr Biden says Ukraine will get a new military aid package worth $500 million to be announced on Tuesday.

The unannounced trip comes after the White House said last week that there were no plans for the president to cross into Ukraine during his visit to Poland this week, to mark the anniversary of Russia’s invasion.

Ukiraine President Volodymyr Zelenskyy said he and Mr Biden discussed long-range weapons during his visit.

Ukrainian MP Lesia Vasylenko confirmed Mr Biden’s visit and wrote on Twitter: “Welcome Mr. President!”.

Polish prime minister Mateusz Morawiecki said on Sunday that he and Mr Biden will discuss the possibility of increasing US troop presence in Poland.

It follows a series of recent trips by Mr Zelenskyy to a number of Western allies including the UK and France.

In December, Mr Zelenskyy visited President Biden at the White House on his first trip out of Ukraine since the war began.