Heart-stopping camera footage has been released of two gunmen calmly strolling through Tunisia 's National Bardo musuem in the terror attack which left 23 people dead . 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 has a red hoodie 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 . Sinister : 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 . Chilling : The two attackers in the National Bardo museum pass the man before unleashing the terrorist attack that left 23 people dead . Deadly : The man in the backpack scuttles off as the two armed men prepare to carry out the chilling attack . Danger : One of the men , in a heavy jacket and tracksuit bottoms can be spotted fiddling with an assault rifle . The video also shows stills of the dead gunmen who were killed in a firefight with security forces , including a picture indicating at least one was wearing an explosive belt . 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 . 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 . Dark : The two armed man pictured on CCTV footage strolling through the museum before the terror attack . Armed : The two unidentified men are seen inside the National Bardo museum before the murderous attack . Tunisia 's largest museum , built in a 15th Century palace . Contains 8,000 works , including one of the world 's largest collections of Roman mosaics . Some items in the collection are more than 40,000 years old . A new wing was added in 2009 , doubling its size . The victims included a Tunisian police officer and tourists from Japan , Italy , Colombia , Australia , Spain , France and Poland . 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 . In an address to mark 59 years of independence from France yesterday , Tunisia 's president Beji Caid Essebsi said : 'We wo n't win if we do n't stand together . We will be merciless in the defence of our country . ' The attack is a huge blow for Tunisia 's tourism industry ( which accounts for seven per cent of the country ’ s GDP ) and its government . It comes at a fragile moment for a country just emerging to full democracy after a popular uprising four years ago . Elsewhere today , hundreds of people gathered for a mass in the cathedral , lighting candles to remember the victims in a ceremony attended by government ministers . Guarded : 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 . Respect : A woman prays for the victims of the attack of the National Bardo museum during a mass ceremony . Terror : Hostages flee the museum during the Tunisian special forces raid which ended in the death of both gunmen . Shattered : The walls and windows were peppered with bullet holes while unused grenades lay scattered among debris .
Footage released of gunmen calmly walking inside National Bardo museum . One of attackers in the CCTV is wearing a baseball cap and a heavy jacket . The other , also carrying assault rifle , has a red hoodie and tracksuit pants . Deadly terror attack on Wednesday in Tunis museum left 23 people dead .