There must have been 200 guns firing to the sky.

当时恐怕有200支枪朝天射击。

Reports of some machine gun firing inside were made and the robbers used more explosives to blast their way through into the building's vault.

有报道称，大楼内有机关枪射击的声音，匪徒们使用了更多的炸药，打通了大楼的金库。