A British businessman who was killed in China had been providing information to the British secret service, the Wall Street Journal newspaper claims.
Neil Heywood had been communicating with an MI6 officer about top politician Bo Xilai for at least a year before he died, the paper said.
The UK Foreign Office said it would not comment "on intelligence matters".
In April, Foreign Secretary William Hague said Mr Heywood was not a government employee "in any capacity".
The case is at the heart of Chinaís biggest political scandal in decades.
The November 2011 death of Mr Heywood brought down Mr Bo, the former Communist Party chief of Chongqing and a high-flier who was once tipped for top office.
Mr Boís wife, Gu Kailai, was jailed in August for the murder of Mr Heywood at a Chongqing hotel. His former police chief, Wang Lijun, has also been jailed in connection with the scandal.
Read the full article at: bbc.co.uk