A third attacker is still on the run after the massacre at Tunisia 's Bardo museum which left 23 dead , the country 's president has said . President Beji Caid Essebsi said the attack involved 'three aggressors ' and the third man escaped , in an interview broadcast on French television . He was speaking live with French network iTele from inside the museum where extremists killed 21 people . Scroll down for video . A third attacker is still on the run after the deadly assault on Tunisia 's Bardo museum , the country 's president Beji Caid Essebsi has said . The news comes after a video was released of the pair roaming the Bardo , and appearing to 'let go ' a visitor . The two attackers encounter a man with a backpack walking down a flight of stairs in the museum - but let the visitor escape with his life before carrying out the deadly attack . he man in the backpack scuttles off as the two armed men prepare to carry out the chilling attack . Suspects have been arrested over the attack but it was previously believed just two gunmen launched the attack on the museum . The news comes after a video was released of the pair roaming the Bardo . The one-minute video posted on the government 's Interior Ministry Facebook page shows the two men scurrying through the Tunis museum , carrying assault rifles and bags . One of the attackers is wearing a baseball cap and a heavy jacket , while the other wears a red hooded jumper and tracksuit pants . At one point , they encounter another man with a backpack walking down a flight of stairs . They briefly acknowledge each other and let the unidentified man walk free before unleashing the deadly attack in the country 's largest museum . The video also shows stills of the dead gunmen - named as Yassine Laabidi and Hatem Khachnaou - who were killed in a firefight with security forces , including a picture indicating at least one was wearing an explosive belt . Hostages flee the museum during the Tunisian special forces raid which ended in the death of both gunmen . The government now plans to deploy the army to major cities to bolster security following the shootings - here policeman stand outside the Carthage International Airport in Tunis . Police responding to the attack shot and killed the two gunmen . They were identified as Tunisians in their 20s who had trained in Libya . Essebsi said the extremists who have recruited about 3,000 Tunisians to fight in Iraq and Syria have no credible connection to Islamic belief . He said his country was at war with them . 'When war is brought upon us , we will wage war , ' he said . ISIS claimed Wednesday 's attack on foreign tourists in Tunis , the deadliest involving foreigners in Tunisia since a 2002 suicide bombing on the island of Djerba . Tunisian fighters make up a disproportionately high number of foreign recruits to ISIS in Syria , with as many as 10,000 having signed up . Shattered : The walls and windows were peppered with bullet holes while unused grenades lay scattered among debris . The government said the two gunmen had trained in jihadi camps in Libya before the attack inside the heavily secured Tunisian parliament compound . Among the 23 dead in Wednesday 's attack , 17 were cruise ship tourists , including British mother-of-two Sally Adey . They also included a Tunisian policeman . Mrs Adey , 57 , from Shropshire , had been on a cruise of the Mediterranean with her husband , Robert , and was on an excursion to the museum . Police in Tunisia have arrested five people described as directly tied to the two gunmen . Four others said to be supporters of the cell were also arrested in central Tunisia , not far from where a group claiming allegiance to al Qaida 's North African branch has been active . ISIS issued a statement and audio on jihadi websites applauding the dead gunmen as 'knights ' for their 'blessed invasion of one of the dens of infidels and vice in Muslim Tunisia ' . As investigations into the massacre continue , Tunisian security officials have been asked why the world-famous museum was completely unprotected . The government now plans to deploy the army to major cities to bolster security following the shootings .
President Sally Adey said the attack involved 'three aggressors ' He told French TV station that a third man escaped and was on the run . Was previously believed just two gunmen launched attack on the museum . Deadly terror attack on Wednesday in Tunis museum left 23 people dead .