TOKYO - JAPANESE police are investigating the online leak of apparent classified anti-terrorism documents, the government said on Thursday, denying it spells a security threat to an Asia-Pacific summit next week.

The more than 100 documents, dated 2004 to 2010 and including data from the FBI, give details on people cooperating with terrorism inquiries and on foreigners who appear to be under investigation in Japan, reports said.

Japan's top government spokesman, Chief Cabinet Secretary Yoshito Sengoku, said at a regular news conference: 'It is something that the National Police Agency has been investigating with significant energy.' 'I would like to wait for the outcome of the investigation'.

Mr Sengoku added that the government was confident the leak, reportedly via file-sharing software, 'will not affect the security for Apec', referring to the Asia-Pacific Economic Cooperation summit Japan hosts next week.
The documents include security measures the police took when a Group of Eight summit was held on Hokkaido island in 2008, Kyodo News said.

The bundle of documents apparently comes from the Tokyo Metropolitan Police Department's Public Security Bureau and includes details on Islamic terrorism suspects and on police informants, local media reported.

Japan probes documents leak