US

Authorities concerned Islamic State group's Internet propaganda could cause trouble at home

US Marshall's lead Mufid A. Elfgeeh, 30, a naturalized U.S. citizen from Yemen, out of Federal Court following a hearing Monday, June 1, 2014 in Rochester. The Rochester man was indicted Tuesday Sept. 16, 2014 on charges that he tried to provide material support to the Islamic State by helping three men who said they would travel to Syria to “engage in violent jihad” alongside the group’s militants, according to the Justice Department.  (AP Photo/Democrat & Chronicle, Shawn Dowd)

US Marshall's lead Mufid A. Elfgeeh, 30, a naturalized U.S. citizen from Yemen, out of Federal Court following a hearing Monday, June 1, 2014 in Rochester. The Rochester man was indicted Tuesday Sept. 16, 2014 on charges that he tried to provide material support to the Islamic State by helping three men who said they would travel to Syria to “engage in violent jihad” alongside the group’s militants, according to the Justice Department. (AP Photo/Democrat & Chronicle, Shawn Dowd)  (The Associated Press)

Authorities are increasingly concerned that online anti-American propaganda attributed to the Islamic State group could inspire homegrown terrorists in the United States.

The latest edition of a slick digital magazine linked to the group taunts President Barack Obama. It also roots for the complete collapse of what it calls the modern American empire.

The rise of the Islamic State group and the proliferation of al-Qaida offshoots has multiplied the extremist messages found on the Internet.

New York authorities say the rants are reaching an even broader audience and upping their potential to incite domestic attacks by so-called "lone wolves."