ITV News's video: New mass grave found containing thousands of civilians says Mariupol mayor ITV News

The mayor of the besieged Ukrainian port city of Mariupol told ITV News a new mass grave has been discovered containing "thousands of civilians". It came as the United Nations said there is growing evidence of war crimes carried out by Russia, describing it as a "horror story of violations". Thousands remain trapped under fire in Mariupol. Some of their loved ones, who had hoped to collect them from an evacuation convoy, put their phones on loud speaker so the world would hear what those stuck in the city have to say. Read more: https://bit.ly/3xH7Q9k • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on Facebook: https://www.facebook.com/itvnews/ Follow ITV News on Twitter: https://twitter.com/itvnews Follow ITV News on Instagram: https://www.instagram.com/itvnews/