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US President Joe Biden called Russian President Vladimir Putin a war criminal on Monday and urged holding a war crimes trial, as a global outcry mounted over civilian killings in the Ukrainian town of Bucha.
"You saw what happened in Bucha," Mr Biden told reporters at the White House. "This warrants him - he is a war criminal."
The discovery of a mass grave and tied bodies shot at close range in Bucha , outside Kyiv, a town taken back from Russian troops, looked set to galvanise the US and Europe into additional sanctions against Moscow.
Mr Biden said: "We have to gather the information. We have to continue to provide Ukraine with the weapons they need to continue the fight. And we have to get all the detail so this can be an actual, have a war crimes trial."
Mr Putin "is brutal. And what's happening in Bucha is outrageous, and everyone's seen it," Mr Biden said.
The Kremlin categorically denied any accusations related to the murder of civilians , including in Bucha, where it said the graves and corpses had been staged by Ukraine to tarnish Russia.
Ukrainian President Volodymyr Zelenskyy spoke on national television from the town of Bucha in the Kyiv region on Monday.
"These are war crimes and will be recognised by the world as genocide," Mr Zelenskyy said, wearing body armour and surrounded by military personnel.
The persecution of war crimes could be directed through the International Criminal Court (ICC), though the US in 2002 pulled its support from the independent panel.
White House National Security Advisor Jake Sullivan also suggested other venues could be considered.
Also on Monday, Washington's UN ambassador said it would ask the UN General Assembly to suspend Russia from the Human Rights Council.
Mr Biden also told reporters that he is "seeking more sanctions" as a response.
- with Reuters.
In the courtyard of their house, Vlad Tanyuk, 6, stands near the grave of his mother Ira Tanyuk, who died because of starvation and stress due to the war, on the outskirts of Kyiv. AP
A Ukrainian soldier walks with children passing destroyed cars due to the war against Russia, in Bucha, on the outskirts of Kyiv, Ukraine. AP
President Volodymyr Zelenskyy surveys the destruction in Bucha. AFP
Residential buildings damaged during fighting in the southern port city of Mariupol. Reuters
A bridge damaged by shelling in Bucha. EPA
A soldier stationed in Bucha, after the city was the recaptured by the Ukrainian army. EPA
Chervona Voloshin kisses Varvara Statenova goodbye as she heads home to Kyiv after being housed at a shelter for displaced people in Lviv, Ukraine. Getty Images
Parts of a destroyed aircraft at the Antonov airport in Hostomel, outskirts of Kyiv. AP
A Ukrainian territorial defence serviceman walks past a destroyed Russian armoured personnel carrier in the town of Borodianka, north-west of Kyiv. AFP
Tanya Nedashkivska recounts how her husband Vasyl Ivanovych, who served in Ukraine’s navy, was killed by Russian soldiers, in Bucha, Ukraine. He was arrested by Russian soldiers. Tanya looked for him for days and found him in a building's basement where two bodies were lying. She recognised him by his shoes and trousers. AP
Damaged residential buildings in the southern port city of Mariupol. Reuters
Families arrive to board a train at Kramatorsk central station as they flee the eastern city, in the Donbas region. AFP
Romanian politicians listen to President Zelenskyy’s speech by video link, on a screen in the parliament in Bucharest. AP
The remains of a Russian Su-35 aircraft that was hit by the Ukrainian armed forces in Kharkiv. Reuters
A damaged monument to Ukrainian poet Taras Shevchenko in the besieged city of Mariupol, southern Ukraine. Reuters
A man removes a door covering the opening to an underground concrete enclosure in which bodies of civilians killed by Russian forces, residents say, were dumped as people were unable to transport them to a cemetery in Bucha, Ukraine. AP
A Ukrainian soldier tries to convince a puppy to drink milk as residents wait for distribution of food products in Motyzhyn, Ukraine, which was until recently under the control of the Russian military. AP
The pain of war is evident as women wait for food aid in the village of Motyzhyn. AP
Ukraine's President Volodymyr Zelenskyy appears on screen during the 64th Grammy Awards at the MGM Grand Garden Arena in Las Vegas. AFP
The gutted interior of a theatre in central Mariupol, destroyed in the course of Ukraine-Russia conflict. Reuters
Desolation in Mariupol which has suffered intense bombardment. Reuters
A Ukrainian soldier walks in front of the remains of an Antonov An-225 Mriya cargo plane, the world's biggest aircraft, destroyed by Russian troops at an airfield in the city of Hostomel, in the Kyiv region. Reuters
A local woman salutes Ukrainian soldiers in the Chernihiv region. Reuters
A woman hugs a Ukrainian soldier after a convoy of military and aid vehicles arrived in the formerly Russian-occupied town of Bucha, near Kyiv. AP
Smoke rises after an attack by Russian forces in Odesa. AFP
Ukraine's President Volodymyr Zelenskyy presents an award to an injured Ukrainian service member at a military hospital in Kyiv. Reuters
A destroyed building in the eastern Ukrainian city of Kharkiv. AFP
People, mainly women and children, pass through the Medyka border crossing on their journey out of Ukraine and into Poland. Getty
Updated: April 04, 2022, 4:42 PM