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Ukrainian President Volodymyr Zelenskyy said he was “sincerely thankful” to the US for the new round of $800 million in military assistance.
In his daily late-night address to the nation, Mr Zelenskyy also said he was thankful for Wednesday’s visit by the presidents of Poland, Estonia, Lithuania and Latvia.
He said those leaders “have helped us from the first day, those who did not hesitate to give us weapons, those who did not doubt whether to impose sanctions.”
In a phone conversation with US President Joe Biden, Mr Zelenskyy said they discussed the new weapons shipment, even tougher sanctions against Russia and efforts to bring to justice those Russian soldiers who committed war crimes in Ukraine.
He also commented on Russia's military approach, saying: "All this feverish activity of the occupiers testifies first of all to their insecurity.
"To the fact that even with significant stocks of Soviet military equipment and a significant number of soldiers, whom the commanders do not spare at all, the Russian troops doubt their ability to break us, to break Ukraine.
"Well, we do everything to justify their doubts."
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A boy rides a bicycle past a house that was damaged by shelling in Andriivka village, not far from Kyiv. EPA -
A destroyed residential building in Mariupol, south-eastern Ukraine. Reuters -
Firefighters at work on the outskirts of Kharkiv, north-east Ukraine. EPA -
A torn Ukrainian flag in front of a ruined Mariupol apartment building. Reuters -
Residents who cleared debris after Russian shelling eat lunch outside a damaged building in Makariv, near Kyiv. EPA -
Children play with a therapeutic dog at a shelter organised by volunteers in Zaporizhzhya, Ukraine. Reuters -
A girl stands by the door of a bunker in Severodonetsk, in eastern Ukraine's Donbas region, as Russian troops intensify a campaign to take the strategic port city of Mariupol. AFP -
A firefighter at work following a missile attack near Kharkiv International Airport. Reuters -
A Ukrainian fighter walks in front of a destroyed house in Bohdanivka village, north-east of Kyiv. AFP -
Two women hug outside a heavily damaged apartment block following an artillery attack in Kharkiv. Reuters -
Ukrainian soldiers guard the village of Barvinkove, as Russia's invasion on Ukraine continues. Reuters -
Leonid Serdiuchenko, a Ukrainian commander, stands next to destroyed vehicles outside Barvinkove. Reuters -
A woman carries the portrait of Dmytro Stefienko, 32, a civilian killed during the war, during his funeral in Bucha, Ukraine. AP -
A Russian soldier collects weapons from inside the Mariupol drama theatre in Ukraine. AFP -
Relatives and friends attend the funeral of Andriy Matviychuk, 37, who served as a territorial defence soldier, who was captured and killed by the Russian army in Bucha, Ukraine. AP -
Anatoliy Morykin, 45, left, mourns the death of his mother, Valentyna Morykina, 82, who died in a retirement home in Bucha during the Russian invasion. AP -
Nadiya, 65, shows a hole in a wall of a building after shelling in Zalissya, Ukraine. EPA -
A booby trap found by locals near their home in Zalissya. EPA -
Debris of a school bus near a damaged school that was a base for Russian troops in Bohdanivka, Ukraine. EPA -
A man examines the debris of a destroyed Russian tank in Bohdanivka. EPA -
President Joe Biden speaks to the media before boarding Air Force One at Des Moines International Airport, en route to Washington. AP -
Valentina Saroyan sits in the basement of a school in Yahidne, near Chernihiv, Ukraine. AP -
Vasyl Cherepenko stands next to a mass grave at a cemetery in Yahidne, near Dnipro, Ukraine. AP -
Oksana, second from left, and Yevhen, right, talk with police officers next to their apartment building damaged by shelling in Irpin, Ukraine. AP -
Women bid farewell to relatives as they leave the Slovyansk central station in the Donbas region. AFP -
The partially destroyed Mariupol drama theatre in Ukraine, hit on March 16 by an air strike. AFP -
A man embraces his wife as she prepares to board a train at Slovyansk central station in the Donbas region. AFP -
A woman walks through a damaged apartment building after a Russian attack in Kharkiv, Ukraine. AP -
A missile pierces the road in front of the Kharkiv Regional State Administration building amid Russia's attack on Ukraine. Reuters -
A boy walks by unexploded Russian shells in the village of Andriyivka close to Kyiv, Ukraine. AP -
Ukrainian tanks move down a street in Irpin, on the outskirts of Kyiv. AP -
A man walks past a storage place for burned armed vehicles and cars, on the outskirts of Kyiv. AP -
Local residents stand on top of a Russian tank on the outskirts of Kyiv. AP -
Ukrainian families, who have fled Kherson amid the Russian invasion, watch a dolphin show at a hotel in Odesa, Ukraine. Reuters -
Residents stand outside their apartments as shops burn after a Russian attack in Kharkiv, Ukraine. AP -
Irina Szymanska holds her baby in a temporary shelter at the central train station for displaced people heading to Poland in Lviv, Ukraine. Getty Images -
A man walks in his yard, damaged by shelling, in the village of Andriivka, Ukraine. EPA -
Sixty-two-year-old Luba hugs a Ukrainian servicewoman in Andriivka. EPA -
A woman washes clothes in the yard of a ruined house in Andriivka. EPA -
Russian soldiers patrol a street in Volnovakha, in the self-proclaimed Donetsk People's Republic. The picture was taken during a trip organised by the Russian military. AFP -
Russian mine clearers search for explosive objects in a building the Russian authorities say was damaged by Ukrainian shelling. AFP -
A woman reads a book as residents find shelter from shelling in a metro station in Kharkiv. Reuters -
Firefighters try to contain a fire at a plant in Kharkiv following Russian shelling. Reuters -
Farm owner Zlobina Lubov tends to her animals in the village of Malaya Rohan, Ukraine. Reuters -
A bathtub is seen inside a building that was heavily damaged by shelling in Kharkiv. Reuters -
A man looks out of his window, amid Russia's invasion of Ukraine, in Borodianka. Reuters -
Soldiers 'came to my house and said go to the basement' Zinaida Makishaiva, 82, said, before they started to shoot around her. 'God saved my life,' she said. Reuters -
A mother waits for police officers to exhume the body of her son from a well at a fuel station in Buzova, Kyiv region. According to the head of the village, he was killed by Russian soldiers. Reuters
Mr Zelenskyy also said work was continuing to clear tens of thousands of unexploded shells, mines and trip wires that were left behind in northern Ukraine by the retreating Russians.
He urged those returning to their homes in those towns to be wary of any unfamiliar object and report it to police.
