July 12 (Reuters) - Abbott Laboratories and St. Jude Medical Inc said they each received a request for additional information from the U.S. Federal Trade Commission related to their deal.

Abbott said in April that it would buy St. Jude in a $25 billion deal to expand its heart device business.

The request extends the waiting period - the time frame before companies can close a deal, as required by the Hart-Scott-Rodino Antitrust Improvement Act - by 30 days after the two companies have complied by providing additional information.

(Reporting by Subrat Patnaik in Bengaluru; Editing by Maju Samuel)