New York Rep. Michael Grimm, who is facing federal criminal charges, is expected to surrender to the FBI on Monday, according to sources familiar with the case.

Grimm is believed to be facing charges related to a private business deal that he made prior to being elected to Congress that involved an Upper East Side health food restaurant.

The exact charges have not been made public, but last week Grimm’s lawyer, William McGinley, confirmed in a statement that prosecutors have said they intend to file criminal charges.

“We are disappointed by the government’s decision, but hardly surprised. From the beginning, the government has pursued a politically driven vendetta against Congressman Grimm and not an independent search for the truth,” McGinley said. “Congressman Grimm asserts his innocence of any wrongdoing. When the dust settles, he will be vindicated.”

READ MORE: NBC NEW YORK