In Rogue One, Director Krennic and Grand Moff Tarkin decided to test the capability of the Death Star by firing its superlaser at the Holy City on Jedha. In order to cover up what really happened, the event was labeled as a mining accident by other officials.
Darth Vader: The Senate has been informed that Jedha was destroyed in a mining disaster.
Did the Imperial Senate really buy this explanation? Could such an accident really blow a city up to orbit? Or were Vader & Co. only demonstrating their scorn on the Senate with the statement?