NBC has apologized to a Republican presidential candidate over an incident on a late-night talk show, CNN.com reports.

The network apologized to Michele Bachmann after the house band on "Late Night with Jimmy Fallon" gave her a rude musical greeting, the story reports.

Doug Vaughan, senior vice president for special programs and late night at NBC, sent the presidential candidate a letter on Wednesday, calling the incident "not only unfortunate but also unacceptable," according to Rep. Bachmann’s spokeswoman, the story says.

As previously reported, the Roots played the 1985 Fishbone song "Lyin’ Ass Bitch" as Bachmann walked onto the stage for an appearance on the show.