Two guards were killed and seven other wounded when Islamic terrorists attacked a gas pipeline in the Djebahia region of Algeria.

The area is considered a stronghold of al-Qaeda in the region but the militants rarely make attacks in the area. The attack comes less than a month after an attack on a gas plant in eastern Algeria that killed 37 foreign workers.

The government has not released the extent of damage to the pipeline. The pipeline is a major source of income for the government’s economy.

Armies searched the area but were unable to find the terrorists after the attack.