U.S. auto safety regulators on Thursday ordered Japanese supplier Takata Corp. to provide documents and answer questions under oath related to the government¡¯s ongoing probe of potentially defective Takata air bags in millions of U.S. vehicles.

The National Highway Traffic Safety Administration sent a special order to the supplier¡¯s American unit, TK Holdings Inc., ordering delivery of the documents by Dec. 1.

Takata spokesman Alby Berman said on Thursday the company ¡°is cooperating fully with NHTSA and is working to meet their requests.¡±