Insurgents on two or three motorcycles showed up and lobbed pipe bombs at the facility at about 1.40am.
A little while later, some 20 men showed up, surrounded the area and began firing with military-grade weapons.
This resulted in a half-an-hour-long gunfight, though nobody in the Army base was injured.
As of press time, police officers and an explosive ordnance disposal unit were collecting evidence and securing the site.