By Anne-Marie Green

TRENTON, NJ (CBS) – About 50 FBI investigators raided the Trenton City Hall building Thursday morning.

They left Thursday afternoon with several large boxes, spending much of their time on the third floor of the building where the business offices are located.

This was a shocking seen for some who work in the building, but not for all.

“Amen, they finally arrived,” said George Muschal, city councilman.

City business administrators spoke to employees in a number of departments telling them to cooperate.

The search is in connection with a previous FBI raid on Wednesday at the home of Trenton mayor Tony Mack.

Mack, whose administration has not been without trouble—including police layoffs, cabinet appointees and his half brother’s guilty plea to misuse of water department equipment and overtime—left City Hall quietly on Wednesday afternoon without comment on the raid at his home.

Eyewitness News reporter Robin Rieger spoke to Mack Wednesday morning who said, “I have not violated the public trust, nor have I violated my public duties.”

But the FBI confirmed search warrants were executed at Mack’s home, as well as the River Drive home where neighbors say the mayor’s brother, Raphael Mack, lives. Raphael Mack is a Trenton School District social worker and high school football coach.

As of Wednesday, Mayor Mack had not been asked to step down.

The FBI also said that no charges have been filed.