A top official in the District’s employment services agency has been fired in connection with an ongoing investigation into suspected unemployment insurance fraud, city officials said Wednesday.

Gaby L. Fraser, 55, was taken off the job Sept. 1 and fired Tuesday.

No charges have been filed against Fraser, but Mayor Vincent C. Gray (D) and aides confirmed Wednesday that the termination was related to the investigation being conducted by the Office of the Inspector General.

“This was done with speed, let me put it that way,” Gray said. “There was enough there to have someone removed from the job.”

Gray said the allegations surrounded “people getting on unemployment that shouldn’t have been there.” Other administration officials say the probe is looking into whether Fraser improperly placed family members or other associates on the unemployment compensation rolls.

Reached Wednesday, Fraser declined to address the allegations. “Right now, I can’t say anything because I don’t know anything,” she said. “I’m just in the dark as much as you are.”

Employment Services Director Lisa M. Mallory said Fraser is the only department employee currently implicated in the probe, which was prompted, she said, after a claims monitoring system “detected an abnormality.”

“I took very speedy action after that,” said Mallory, who declined to discuss the amount of money in question.

A city employee since 1997, Fraser served as an unemployment compensation claims officer making more than $97,000 a year, according to city records published in March. Department spokesman David Thompson said Fraser was appointed interim assistant director of the unemployment insurance office this summer.

Fraser is well known in Ward 8 political circles for her work as a campaign organizer. She served as an executive committee member for the Ward 8 Democrats until recently, and has been a paid consultant for numerous campaigns, including former mayor Anthony A. Williams’s 2002 reelection bid.

Gray spokeswoman Linda Wharton Boyd said Fraser has “no formal role that I know of” in Gray’s mayoral campaign last year.

Staff writer Nikita Stewart contributed to this post.