Federal authorities have arrested a fifth man in connection with a group of ISIS sympathizers from Brooklyn who are charged with plotting to join the terror group and wage jihad on the United States.

Akmal Zakirov was charged Thursday with conspiring to provide material support to the notorious organization by funding overseas-travel plans for several alleged cohorts, according to Brooklyn federal-court ­papers.

His arrest follows the busts of Abdurasul Juraboev, 24, and Akhror Saidakhmetov, 24, both of Brooklyn, for plotting to join the group abroad.
The feds claim the suspects planned to attack NYPD officers back home in New York City if their overseas gambit failed.

Two additional associates, Abror Habibov and Dilkhayot Kasimov, were also arrested for helping raise travel funds.

All of the men are being held without bail.

Zakirov pleaded not guilty in Brooklyn federal court Thursday and was remanded.