Mysterious 'Slow Internet' Outbreak Hits Major US Cities. Reports are emerging of widespread internet connectivity issues affecting major cities across the United States, with hundreds of thousands of users complaining of slow speeds and dropped connections. The cause of the outage remains unclear, but experts speculate it may be related to a recent surge in online activity or a possible cyberattack. As the situation continues to unfold, internet service providers are working to identify the source of the problem and restore normal service to affected areas.