Ukrainian President Volodymyr Zelensky has visited troops conducting military drills near the north-western city of Rivne, his office announced, amid repeated warnings from the United States of a possible Russian invasion. Fighter jets, combat drones, artillery, multiple rocket launchers and anti-tank missiles were used in the exercises, according to the statement. Some of the weaponry had been provided recently by Kiev’s Western allies. Ukraine has received several hundred tons of weapons and ammunition from NATO countries in response to a massive build-up of Russian troops on its borders.