The Third Tunis Bardo Museum attacker on the run

A third attacker is still "on the run" after the deadly Bardo Museum attack in which 23 people died, Tunisia's president said in a live TV interview.

"There were certainly three attackers there is one who is on the run, he won't get far," President Beji Caid Essebsi said on Sunday.

Suspects have been arrested over the attack but just two gunmen were thought to have assaulted the museum.

The news comes after a video was released of the pair roaming the Bardo.

Mr Essebsi said it was clear there had been three attackers, because they had "been identified and filmed on surveillance cameras".

"We've asked the people to help [find the third attacker] because the people are interested in this."

He added in an interview with French media that a monument would be erected in memory of the victims.

The gunmen are said to have been trained in Libya in an area controlled by Islamic State (IS) militants.

IS has said it was behind the attack on the museum, which is situated next to the country's parliament.

The two gunmen seen in the video were named as Yassine Laabidi and Hatem Khachnaoui. They were both killed in a gunfight with security forces inside the building