article_snippet: Security Minister Rafik did not say which group activated The museum attack suspects, or with whom The museum attack suspects trained.
article_snippet: Already, authorities have arrested nine people in connection with the attack, including four directly linked to it, according to a statement from Tunisian President Beji Caid Essebsi.
article_snippet: And in an audio message posted online Thursday, ISIS claimed responsibility for the attack, which ISIS said targeted "crusaders and apostates" with  "automatic weapons and hand grenades.
article_snippet: CNN cannot independently verify the legitimacy of a statement from Tunisian President Beji Caid Essebsi.
article_snippet: That bloodshed is "just the start," the ISIS message warned -- a threat that may or may not be hollow, but nonetheless adds extra urgency for Tunisian investigators.
article_snippet: The nation's security forces are working to break up other cells like those behind the recent Bardo Museum attack.
article_snippet: CNN know they can launch operations, but CNN must piece together clues in order to conduct an arrest," Chelly said.
article_snippet: The most important thing now is to properly investigate and to find those responsible.
article_snippet: Not theirs, they (the terrorists) are bastards of children.
article_snippet: CNN's Hamdi Alkhshali, Victor Blackwell and journalist Yasmine Ryan contributed to this report.