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Aug. 10, 2015, 2:46 PM GMT / Updated Aug. 10, 2015, 8:03 PM GMT By Cassandra Vinograd

A former New Jersey resident was ordered held without bond Monday on charges of attempting to provide support to ISIS.

The U.S. Justice Department said the charges against Nader Saadeh, 20, were the result of an FBI investigation into a group of individuals from New York and New Jersey. Several others were arrested in June and have already been charged.

Saadeh lived in New Jersey until he left the U.S. in May to allegedly join ISIS, according to the Justice Department. It wasn't immediately clear how and when he returned to the U.S., but the Justice Department said he was arrested Monday morning in New Jersey.

Saadeh sent "electronic messages" expressing his hatred for the U.S. in 2012 and 2013 and posted images of the ISIS flag on Facebook in 2014, according to the Justice Department.

He later allegedly became a "radicalized supporter" of the terrorist group and expressed support for ISIS-related attacks in Paris.

Saadeh — identified as a former resident of Bergen County — was charged in U.S. District Court in Newark with conspiring with other individuals in New Jersey and New York to provide material support to ISIS and with attempting to provide material support to the terrorist organization.