Ford Motor Co F.N. said on Sunday night it was cooperating with U.S. safety regulators investigating a report the driver of a 2007 Ford Mustang was injured in August by a metal fragment from the car’s air bag. The 2007 Mustang was part of a June recall of millions of cars from nine manufacturers because air bag inflators made by Japanese supplier Takata Corp (7312.T) could rupture and send metal fragments into the cabin. The so-called “regional recalls” were carried out mainly in high-humidity states such as Florida after Takata said the inflators could be susceptible to rupture if exposed to moisture or extreme humidity.