Mike "The Situation" Sorrentino, of MTV's "Jersey Shore," is facing a federal investigation into his finances, his publicist said.

The investigation is focused on Sorrentino's companies, specifically the clothing line Situation Nation, MPS Entertainment, Situation Productions and GTL Management, The (Newark, N.J.) Star-Ledger reported Monday.

"Michael Sorrentino is fully aware that the U.S. attorney's office has issued subpoenas for records relating to several businesses he owns," Sorrentino's publicist, Cindy Guagenti, said in a statement.

"Although the nature and the scope of the investigation is not clear at this time, Sorrentino fully expects that when all the facts are revealed no further action will be taken."

Sorrentino, 32, is cooperating with investigators, Guagenti said.

In September, Sorrentino, who appeared on "Jersey Shore" for six seasons, told The Star-Ledger, "I will be back in reality TV soon, which I'm very excited about ... a project that I've worked on for some time and is near and dear to my heart."