At least four explosions were reportedly heard in Mariupol at around 11:00 p.m. on Nov. 9. Read also: Mariupol shaken by explosions, air defense possibly engaged, Ukrainian official says “The base of the air defense systems was attacked along the line from Mariupol Airport to the village of Berdyanske,” he wrote. After the air defense systems were activated, a fire was reported in the area of the airport. One of the air defense systems was hit, according to the mayoral advisor. Andryushchenko previously reported a large movement of military cargo trucks in Mariupol, which he believes signals t…