Hackers claiming to be affiliated with the Islamic State group are threatening a series of cyberattacks in the United States and Europe, according to a video released Monday. The hackers also claimed the ability to monitor electronic devices and communications of Americans and Europeans. “The electronic war has not yet begun,” according to the video. We observe all the movements that you are doing from your devices,” the video warned, directing the threat specifically at the United States and Europe. “Soon you will see how we control your electronic world.”