Volkswagen chief executive Herbert Diess has told the BBC he is "not aware" of reports about detention camps holding thousands of Muslims in parts of China, a country where VW has been operating and producing cars for more than 30 years.

Rights groups have accused China of forcibly detaining and sometimes abusing Uighur Muslims in dozens of camps in Xinjiang province. Beijing denies this, saying people willingly attend special "vocational schools" which combat "terrorism and religious extremism".

VW employs hundreds of people at its Xinjiang production plant. Mr Diess spoke to the BBC's Shanghai correspondent, Robin Brant.