A Twitter account associated with the Islamic State sent out tweets on Monday hinting at a potential attack to be carried out inside the US on the upcoming 14 year anniversary of the September 11 attacks. A tweet published on an accountunder the name of Abu Mohammed al-Khorasani read, "Peace on the P.K. [a kind Russian machine gun] Its shots are thematic (rhymes) It strikes America. Our State is victorious," according to The Investigative Project on Terrorism, a non-profit research group. The tweet was accompanied by the hashtags #11september, #killallamericans, and #ILLINOIS. The New York Post. The clip called on ISIS supporters to target Americans on their own soil. Following the release of the clip, the FBI launched an investigation into a possible Islamic State-inspired terrorism plot at Los Angeles National Airport.The investigation started after intercepted communication and other intelligence information that led officials to believe that a plot could be under way.