Experts are warning that an emerging terror network, which has already claimed responsibility for multiple attacks, needs to be taken seriously by foreign governments. Harakat Ashab al-Yamin al-Islamia (HAYI) first emerged online in March and is targeting Jewish people, symbols and buildings. Authorities in the United States have arrested and charged a man they allege "planned, coordinated and claimed responsibility" for 20 HAYI attacks — a prosecution that is in its early stages.