CHICAGO — The U.S. Marshals service is canceling a high-profile auction of clothing and memorabilia belonging to convicted former U.S. Rep. Jesse Jackson Jr. because of questions about the authenticity of some items.

The agency said Friday that it was scrapping the online auction because of questions about a guitar purportedly signed by Michael Jackson and Eddie Van Halen.

The service says it will “conduct a secondary review” of the items out of “an abundance of caution.”

The auction began Tuesday and included a cashmere fur-trimmed cape and an autographed Michael Jackson poster.

The auction is part of the government’s attempt to recoup part of the $750,000 in campaign funds that the Chicago Democrat and his wife illegally spent. Both were handed prison terms last month.