A hacker has attacked the Web site of a Japanese museum, altering text to state that the Senkaku Islands belong to China.
Part of the Nara National Museum Web site has been shut down. Museum staff are searching the site for other alterations.
The National Institutes for Cultural Heritage says a museum worker noticed on Friday afternoon that the homepage's image database had been altered.
Museum officials have saved the access log for external users and are considering filing a complaint with police.
The issue of sovereignty over the islands has intensified since Wednesday when Chinese activists made an illegal landing on the Japanese-controlled islands in the East China Sea.