ISIS flag
ISIS flag Reuters

A Pennsylvania teenager was indicted on Tuesday after investigators said he tried to help individuals travel to the Middle East to join the Islamic State (ISIS) group, Reuters reported.

Jalil Ibn Ameer Aziz, 19, of Harrisburg, was indicted by a federal grand jury in Scranton on charges of conspiring and attempting to provide material support to ISIS, the Justice Department said in a statement quoted by the news agency.

Aziz was arrested last Thursday, and prosecutors said he had used at least 57 Twitter accounts to advocate violence against Americans, disseminate ISIS propaganda and post the names of American military members that he said should be targeted.

The case is the latest example in the phenomenon of radicalization in the United States, which was most recently illustrated in the shooting attack in San Bernardino, California, where the attackers are believed to had been radicalized for quite some time.

American authorities over the past year or so have arrested and charged several people of supporting ISIS. Last week, a Maryland man was charged with accepting money he believed was from an ISIS supporter overseas.

Faisal Mohammad, a California college student who recently stabbed four people was reported to have been carrying an image of the black flag of ISIS as well as a handwritten manifesto with instructions to behead a student and multiple reminders to pray to Allah.