Updated

An Algerian official says a high ranking commission headed by the prime minister has been formed to investigate the terror attack on a gas complex that resulted in dozens of foreign workers being killed.

The commission includes members from the ministries of defense, interior, foreign affairs, labor and energy, the official said late Thursday, speaking on condition of anonymity because he was not authorized to talk to the press.

The official adds that the Ministry of Energy, meanwhile, is working with British and U.S. experts to review the damage to the Ain Amenas gas complex and determine when or if production can start anew.

The head of the plant told visiting journalists Thursday that he expected at least one of the three gas units would go back into production "soon."