People in Libya saw a strange, bright object in the night sky. Many people filmed the glowing object as it flew over Tripoli and parts of western Libya.
as it flew over= 〜の上空を飛んでいたときに
Shortly after the object passed, people reported hearing a loud explosion.
shortly after= 〜の直後に
Right now, no one knows what the object was. Officials have not released a statement to explain what caused the bright light and noise.