Baidu uncovers trick gambling searches

China's biggest online search engine, Baidu, said on Monday that it had notified police of illegally altered links that redirect users to gambling sites. The links had found their way surreptitiously into Baidu's search results at night.

For the past two months, a search after 10 pm for keyword "Grand Lisboa", a well-known casino in Macao, delivers top results linked to online gambling sites marked as commercial promotions. The search results will return to legitimate information about the casino after 9 am, Beijing News reported on Monday.

Baidu responded to the report with its own investigation.