The developments came as a Syrian national was picked up in Germany for having suspected ties to ISIS, German police said.
In Pennsylvania, 19-year-old Jalil Ibn Ameer Aziz was arrested Thursday on charges of conspiring and attempting to provide material support to ISIS, according to the Department of Justice.
Aziz, of Harrisburg, allegedly ran at least 57 pro-ISIS Twitter accounts and threatened among other things to behead President Obama and arrange travel to Syria for ISIS converts, authorities said.
According to a criminal complaint, Aziz, propagated "hateful rhetoric" on social media and may have been "preparing to conduct or assist others in conducting an attack in the U.S."
On three different occasions, Aziz allegedly used Twitter to assist people seeking to travel to fight for ISIS, acting on one occasion as an intermediary between someone in Turkey and several well-known members of ISIS.
Aziz allegedly also posted a link containing the names, addresses and other identifying information of 100 reported members of the U.S. military and calls for violence against them.
Separately, Adam Shafi of Fremont, California was indicted for attempting travel overseas to join terrorist group al-Nusrah Front, federal authorities said Thursday.
Turkey is a common point of entry into Syria for foreign fighters wishing to join terrorist organizations, the affidavit states. Shafi was arrested a few days later on July 3.
The affidavit also stated that Shafi expressed his love for “Jaulani,” the amir, or commander, of ANF and his hope that “Allah doesn’t take [his] soul until [he has] at least, like, a couple gallons of blood that [he’s] spilled for him.”
The indictment alleges that Shafi knew ANF designated foreign terrorist organization when he tried to provide material support or resources to it.
Shafi was arraigned today. He was in custody in San Francisco just before noon, but had been moved for bail, the release said.
If Shafi is convicted, he could face up to 20 years in prison and a $250,000 fine, the release said.
Meanwhile, on Thursday, the United Nations voted unanimously to sanction revenue ISIS earns from oil, antiquities sales & ransom payments.