Updated

A trove of letters to one of baseball's founding fathers has been removed from an upcoming auction. The FBI is investigating whether they were among items stolen from the New York Public Library.

The 19th century letters were written to Harry Wright. He built the country's first professional baseball team in Cincinnati.

Sports memorabilia dealer Hunt Auctions said Monday that it was removing the letters from the July 14 auction in St. Louis because "many questions still remain unanswered."

The auction company, based in Exton, Pa., said it is working closely with the FBI.

New York Public Library spokeswoman Heidi Singer declined comment, citing the ongoing investigation into the letters' origin.