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Tunisian President Beji Qaid Al Sebsi offers prayers after laying a wreath at the entrance of the National Bardo Museum yesterday to pay tribute to victims of the attack. Image Credit: AFP

Tunis: A third attacker in the deadly assault on the Bardo museum is on the run, Tunisia’s president said Sunday, declaring his country at war with the extremists who killed 21 people at one of North Africa’s most revered cultural institutions.

President Baiji Said Al Sebsi said the attack involved “three aggressors” and the third man escaped. He was speaking live with French network iTele from inside the museum, its elaborate tilework visible behind him.

Meanwhile, Tunisia’s Interior Ministry released security camera footage of Wednesday’s attack showing two gunmen walking through the museum, carrying assault rifles and bags. At one point they encounter a third man with a backpack walking down a flight of stairs. They briefly acknowledge each other before walking in opposite directions.

Police responding to the attack shot and killed the two gunmen. They were identified as Tunisians in their 20s who had trained in Libya.

“When war is brought upon us, we will wage war,” Al Sebsi said. Tunisia’s Interior Ministry has released security camera footage of the gunmen walking through the Bardo museum during the attack that killed 21 people.

The one-minute video posted on the ministry’s Facebook page Saturday shows the two men walking through the museum, carrying assault rifles and bags.

At one point they encounter another man with a backpack walking down a flight of stairs. They briefly acknowledge each other before they walk on in opposite directions. There was no explanation of who the third man was.

One of the attackers is wearing a baseball cap and a heavy jacket, while the other has a red hoodie and track pants.

The video also shows stills of the dead gunmen, including a picture indicating that at least one was wearing an explosive belt.