A 19-year-old Harrisburg, Pennsylvania man, Jalil Ibn Ameer Aziz, has been arrested on charges for the attempt to provide support to the Islamic State group. Aziz is charged with conspiring and attempting to provide material support to terrorists. Federal prosecutors say a backpack in Aziz’s closet contained five loaded high-capacity magazines, a modified kitchen knife, a thumb drive, medication and a balaclava, leading them to suspect he may have been plotting an attack. Authorities say Aziz used Twitter to advocate violence against U.S. citizens and military members and to disseminate Islamic State propaganda. Court papers say Aziz also tried helping others travel to Syria to fight for the Islamic State. A message left at Aziz’s home wasn’t immediately returned on Thursday. Court documents don’t list an attorney who could comment on the charges.