A former Minnesota resident, Mohamed Abdullahi Hassan joined al-Shabab in Somalia more than seven years ago and more recently went online to urge others to carry out violence on behalf of the Islamic State group, authorities said. The New York-based Counter Extremism Project applauded Hassan's arrest, calling him a "prolific jihadi propagandist and recruiter" who "created a broad social-media presence on Twitter and other social media platforms to recruit and incite violence for al-Shabab and ISIS".