Citigroup Inc. has received a subpoena for information from Massachusetts Attorney General Martha Coakley, the New York banking giant disclosed Friday in a quarterly filing with securities regulators.

Coakley served a civil investigative demand on a Citigroup affiliate on Aug. 1, according­ to documents filed with the Securities and Exchange Commission. It followed one filed in June by New York’s attorney general, “seeking documents and information concerning MAT Finance Fund LLC, ASTA Finance Fund LLC, and Falcon Strategies LLC.”

The bank said Coakley’s office was seeking similar documents and information on the funds, which were sold to wealthy customers as alternative fixed-income investments.

A spokesman for Coakley declined to comment on what her investigators are looking for.

Citigroup said in its filing that it “is cooperating fully with these inquiries.” The company did not return a call seeking additional comment.

Citigroup also disclosed it has received requests for documents from the attorneys general of New York and Connecticut related specifically to Libor inquiries. Coakley’s office has also been delving into the Libor interest-rate-rigging scandal.