Updated

A gas installation in Algeria that was the site of a terrorist attack last month that left 37 hostages dead has partially resumed production.

Prime Minister Abdelmalek Sellal started up one of three gas streams at the Ain Amenas site Sunday, bringing it up to about 35 percent capacity, according to state radio.

On Jan. 16, a band of al-Qaida affiliated militants attacked the Ain Amenas complex and took dozens of foreign workers hostage. After a four-day standoff, the Algerian army moved in and killed 29 attackers and captured three others. At least 37 hostages, including one Algerian worker, died in the battle.

The Ain Amenas facility is jointly run by BP, Algeria's Sonatrach and Norway's Statoil. Sunday marked the anniversary of Algeria's 1971 nationalization of its oil industry.