U.S. Attorney Patrick Fitzgerald in Chicago issued subpoenas in a probe of MF Global Holdings Ltd., the broker dealer parent that filed for bankruptcy Oct. 31, a person familiar with the matter said.

MF Global, which was run by former New Jersey Governor Jon Corzine, filed for Chapter 11 bankruptcy after a $6.3 billion bet on the bonds of some of Europe’s most indebted nations prompted regulator concerns and a credit rating downgrade.

The Wall Street Journal reported yesterday that the office of U.S. Attorney Preet Bharara in Manhattan also issued subpoenas in a probe of MF Global.

The person familiar with the matter, who didn’t want to be identified because the investigation isn’t public, said federal prosecutors in New York haven’t issued criminal subpoenas. He said Fitzpatrick’s office sent subpoenas early in the process and no more have been issued.

Randall Samborn, Fitzgerald’s spokesman, declined to comment yesterday on whether the office had issued subpoenas in the probe. Carly Sullivan, a spokeswoman for Bharara’s office, said the office doesn’t confirm the issuance of subpoenas and declined to comment further.