FBI agents raided a 55th-floor office overlooking Biscayne Bay on Tuesday in downtown Miami. The search for evidence is part of a money-laundering investigation related to alleged bank fraud in Ukraine, a source with the FBI said.

The case related to the raid is under seal. Federal agents were at the Southeast Financial Center tower office that two Miami businessmen, Mordechai “Motti’” Korf and Uriel “Uri” Laber, use to run several companies. No one was detained during the raid.

Korf and Laber are prominent members of the Orthodox Jewish Hasidic community in South Florida and live in Miami Beach. They haven’t been charged with any crimes, and the FBI spokesperson did not confirm they were the subject of the investigation.