(Reuters) – A total of 7,331 people were evacuated from Ukrainian cities through humanitarian corridors on Friday, a senior official said, more than double the 3,343 who managed to escape the previous day. Deputy Prime Minister Iryna Vereshchuk said in an online post that 2,800 people had left the besieged city of Mariupol using private transport. (Reporting by David Ljunggren; Editing by Chris Reese)