Several buses are to be used to rescue civilians from the besieged port city of Mariupol in south-eastern Ukraine on Sunday. As a civil initiative announced on the Telegram news channel on Saturday, 10 larger buses are to bring about 500 people to the north-western city of Zaporizhzhia. According to estimates, about 100,000 people are still in the embattled and already heavily damaged city. According to Ukrainian Deputy Prime Minister Iryna Vereshchuk, there should have been an escape corridor for private vehicles from Mariupol as early as Saturday. In addition, the Red Cross was trying to bri…