ISIS spokesman Abu Mohammed al Adnani recently called for attacks on the West during Ramadan, its alert for the EURO 2016 football competition. Omar Mateen, the terrorist who killed 50 people and injured dozens more at a gay nightclub in Orlando, Florida reportedly called 911 to pledge allegiance to ISIS just prior to the attack. Some of the threats have been issued by members of ISIS or the groups supporters. Many have been posted on social media by pro-ISIS hackers such as the Cyber Caliphate Army (CCA) and Ghost Caliphate.”]
Source: https://securityaffairs.co/wordpress/48444/breaking-news/ramadan-euro-2016-isis.html