When Aziz was arrested on Thursday, prosecutors said he had used at least 57 Twitter accounts to advocate violence against Americans.

A Pennsylvania teenager was indicted on Tuesday after investigators said he tried to help individuals travel to the Middle East to join Islamic State of Iraq and Syria (ISIS), the U.S. Justice Department said.

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

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

Aziz is scheduled to appear in a Harrisburg court on Wednesday for a detention hearing and arraignment, the statement said.

Related articles across the web

• Pennsylvania man charged with providing support to Islamic State -Justice Dept.
• Officer who faced scrutiny for fatal shooting named union VP
• Mexican national indicted for illegal re-entry
• World › California shooters' ex-neighbor charged with supporting terrorists
• Russian Man Gets 4-Year Prison Sentence For U.S. Nuclear Bribery Scheme
• American Man Gets 8-Year Sentence in Terror Plot
• Tamir Rice And The Grand Jury Scam
• Documents: Harrisburg man used social media to radicalize, recruit for ISIL
• News | FBI's Most Wanted Terrorist List - Who Are They Looking For
• Attorneys Ask DOJ to Probe Cleveland Police Shooting of Boy