'We don't know what weapon was used by the men to fire at our officers,' he said.

The shoulder buttons are used to fire whatever weapon is equipped.

The military said the structures had been used to fire at soldiers.

Later, the artillery was used to fire directly into the mouths of enemy caves.

This was used to fire from atop walls down at enemy troops.

Helicopter gunships have been used to fire on the protesters.

A distributor based system is used to fire the cylinders in a 1-3-4-2 order.

It can also be used to fire waves of energy to attack.

The blowgun can be used to fire darts, as well.

Referendums are used to fire shots at a government in office.