Kvedaravicius, 45, was known for his 2016 documentary, Mariupolis, which won Best Documentary at the Lithuanian Film Awards, as well as receiving commendations at the Berlin, Hong Kong and Stockholm film festivals. The film-maker also directed the 2011 award-winning documentary Batzakh, on Russia's war in Chechnya.
According to the Ukrainian Ministry of Defense, the film- maker's car was shot at by Russian soldiers while he was trying to leave Mariupol. He was immediately taken to the hospital where he died.
The International and European Federations of Journalists said: "We are deeply shocked and strongly condemn this deliberate killing of another media worker. Once again, journalists are civilians and should be protected and respected as such. The killing of Mantas Kvedaravicius is a crime that cannot go unpunished".
At least seven other journalists have been killed since Russia launched a full-scale invasion of Ukraine in late February:
Ukrainian photojournalist Maks Levin was found dead in Kyiv on 1 April.
Yevheniy Sakun, an Ukrainian cameraman for LIVE TV was killed on 1 March during a rocket attack on the TV tower in Kyiv;
Ukrainian journalist Viktor Dedov died on 11 March in Mariupol after his flat was bombed;
Brent Renaud, a US journalist was shot dead in Irpin, on 13 March;
Pierre Zakrzewski, Fox News camera operator, and Ukrainian journalist Oleksandra “Sasha” Kuvshynova, were killed on 14 March while reporting from Horenka.
Russian journalist Oksana Baulina, was killed after coming under Russian shelling with another civilian while she filmed destruction at a shopping centre in Podil district in Kyiv, on 23 March.
Donate to the IFJ/EFJ Safety Fund for journalists in Ukraine