Rochester police chief David Dubois said there were initially four adults and one child in the campaign office but that Eisenberg immediately released a mother and young child when the standoff began.
A female campaign volunteer escaped from the building about 2 1/2 hours later and was quickly escorted to safety. A second was released soon afterward.
A man who appeared to be in his 20s was led to safety after the arrest of Eisenberg, who faces kidnapping, reckless conduct and possible federal charges.