TRENTON, N.J. — FBI agents raided City Hall in New Jersey’s capital on Thursday, a day after searching the home of the city’s embattled mayor, his brother, and a campaign donor.

The FBI said it had a search warrant for several offices but declined to be specific.

Recently appointed city business administrator Sam Hutchinson, whose department was among those searched, told The Trentonian that FBI agents were also in the office of Mayor Tony Mack.

Mack, 46, denied wrongdoing on Wednesday after the FBI searched his home and those of Ralphiel Mack and businessman Joseph Giorgianni, a campaign donor who is a convicted sex offender.

A reply to an e-mail sent Thursday to the mayor’s top aide was not immediately sent.

The Democrat’s first two years in office have been marked by repeated accusations of reckless spending, cronyism, and mismanagement.