The attack took place at the Bardo national museum in the Tunisian capital, Tunis. At the time, the area was packed with tourists and locals.
This morning, it was confirmed that British woman, Sally Adey, lost her life in the attack. MSC Cruises said this morning that nine guests aboard the Spendida were killed and 12, including a British woman , were unaccounted for.
Ms Adey's family have been informed of the tragic news.
At least 22 people died when terrorists, disguised as soldiers, burst into the museum and sprayed bullets into the crowd. The unnamed men were carrying Kalashnikovs and grenades.
Chillingly, the terrorists chased people as they fled and picked them off.
One local told of his horror as he wanted the gunmen pick out their victims, including children, from the panicked crowd.
“They opened up on anything that moved,” he said. “The choice was to run away, or face certain death or injury.”
Now, a manhunt is underway in the North African nation for three men believed to be involved in the attack.
During the shooting, the gunmen took around 30 hostages and locked down the museum for two hours. The ordeal ended after police swarmed the building and killed the shooters.
The Tunisian Prime Minister Habib Essid spoke after the attack and said how holidaymakers were picked out, after they arrived at the museum.
“The terrorist fired randomly as tourists got off the buses,” he said. “As they fled, they were hunted and chased down. We need all Tunisians to stand up against this.”
Although it’s not known who has claimed responsibility for the attack, early reports claim that the shooting had similarities to previous ISIS attacks.