Mohamud Abdikadir Muse, Muse Abdikadir Muse, and Mohamed Salat Haji came to the FBI's attention when Mohamud Abdikadir Muse began posting ISIS propaganda to Facebook. Three FBI undercover agents posing as ISIS members then began communicating with the men online. Muse Abdikadir Muse is Mohamud Abdikadir Muse's brother, while Haji is Mohamud Abdikadir Muse's brother-in-law. An undercover agent suggested the three men travel to Somalia to join the ISIS affiliate there. The men allegedly pledged allegiance to ISIS. The FBI sent $1,200 to the men to purchase tickets to Somalia. The three were arrested at the airport in Lansing, Michigan, as they attempted to travel.