Security forces are still hunting two further men, who are suspected to have trained in Libya along with the gunman who killed 38 on a popular tourist beach in Sousse, Tunisia.
Friday’s attacks shocked the North African country and its European neighbours - many of whom travel to the destination for cheap, sunny breaks.
The deadly attack was claimed by IS, with the individuals involved believed to be Libyan trained.
28-year-old Seifeddine Rezgui was identified as the gunman, and later shot dead by police.
Most of those who lost their lives in the attacks were from the UK, including a social worker, several retired couples, and a 24-year-old beauty blogger.
The bodies of the dead are slowly being returned to the UK this week, with many of the survivors refusing to comment on the ordeal until everyone has been formally identified and accounted for.