F.B.I. agents early Tuesday arrested a former deputy chief of staff to Gov. Kathy Hochul and her husband at their home on a cul-de-sac on Long Island’s North Shore, officials said.

Federal prosecutors in Brooklyn are expected to ask a judge to unseal an indictment against the aide, Linda Sun, 40, and her husband, Chris Hu, 41, later in the day, people with knowledge of the matter said.

Because the charges against them remain sealed, they were not immediately disclosed.