(CNN)A fourth man has been indicted in connection with a plot to provide material support to terrorists and for some of the men to join ISIS, according to an indictment from Brooklyn Federal Court released Monday. 

Dilkhayot Kasimov was added to a superseding indictment in which three previously arrested men -- Abdurasul Hasanovich Juraboev, Akhror Saidakhmetov, and Abror Habibov -- were charged with two counts of providing support to a foreign terrorist organization. Those three have pleaded not guilty. It is unclear if Kasimov has been arrested. 

The indictment and a criminal complaint filed last month say Juraboev and Saidakhmetov planned to join ISIS and had purchased airline tickets to Turkey. 

Saidakhmetov has also been charged with travel document fraud after telling authorities he intended to travel for entertainment purposes, according to the indictment. 

He and Habibov were charged with conspiracy to use a firearm to commit a crime. 

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Habibov is a 30-year-old Uzbekistani citizen, who police say "helped organize and finance" the operation. He was arrested in Jacksonville, Florida. 

Court documents say Habibov operates mall kiosks that sell kitchenware and repair mobile phones. He has locations in Florida, Georgia, Pennsylvania and Virginia. 

Habibov was in the United States legally, but overstayed his visa, according to police. 

Saidakhmetov, 19, lives in Brooklyn with Juraboev, his roommate. They are permanent residents of the United States. 

Court documents say Saidakhmetov, a citizen of Kazakhstan, worked at Habibov's mall kiosks in three different states in the fall and winter of 2014. 
How many men have been indicated?
A fourth man has been indicted