May 16 (UPI) -- The Department of Homeland Security has renewed a bulletin warning of the "most serious" environment for homegrown terror threats since the 9/11 attacks.
"Foreign terrorist organizations continue to exploit the Internet to inspire, enable, or direct individuals already here in the homeland to commit terrorist acts," said the bulletin, issued late Monday through the National Terrorism Advisory System. "As the United States steps up efforts to disrupt and defeat terrorist groups overseas, we will continue to face a multi-faceted threat environment."