May 29 (UPI) -- Ukraine on Friday evening said that it expects Russia to launch 'big attacks' against it sometime on Friday or Saturday, and warned its citizens to take cover. Ukrainian President Volodymir Zelynsky told CBS News on Friday evening that it expects Russia to launch new attacks at the country in the next 24 to 48 hours, and advised his citizens to take cover. "Our people have to be very, very careful, cautious and children - they have to use bomb shelters," he told the news