UPDATE 1-Munich prosecutors arrest second suspect in Audi emissions probe

* Prosecutors searched personal, not corporate, locations

* Audi says has no knowledge of arrest

* Arrest follows first detention by prosecutors in July (Adds Audi comment, detail and background)

MUNICH, Sept 28 (Reuters) - Munich prosecutors said they had arrested a second suspect in connection with an emissions scandal at carmaker Audi and have widened the number of suspects in their investigation.

Prosecutors have also searched personal premises, a spokeswoman said on Thursday, adding that corporate locations were not part of the raid.

Audi has no knowledge of the arrest and continues to cooperate with authorities, a spokesman said. The arrest was first reported on Thursday by business newspaper Handelsblatt.

Audi admitted in November 2015, two months after parent Volkswagen's diesel emissions scandal broke, that its 3.0 litre V6 diesel engines were fitted with an auxiliary control device deemed illegal in the United States.

In March Munich prosecutors searched offices at the carmaker's Ingolstadt base, where about 44,000 workers are employed, and the premises of Jones Day, a U.S. law firm hired by VW to lead an investigation into the emissions scandal.

Four months later the U.S. Justice Department said it had charged a former Audi manager with directing employees at the company to design software to cheat U.S. emissions tests in thousands of Audi diesel cars.

The former Audi manager, Italian citizen Giovanni Pamio, was subsequently arrested by Munich prosecutors on suspicion of fraud and false advertising in connection with the carmaker's emissions scandal. Pamio remains in custody pending ongoing German investigations and an extradition request by U.S. authorities. (Reporting by Joern Poltz; Writing by Andreas Cremer; Editing by Douglas Busvine and David Goodman)