By Erik Wasson - 12/21/11 04:08 PM EST
Chinese hackers were able to gain access to the computer systems of the U.S. Chamber of Commerce and steal internal information from the powerful business lobbying group, the Chamber confirmed Wednesday.
The hacking, first reported by The Wall Street Journal, was discovered in May 2010.
The Journal reported the hackers gained access to everything stored on the Chamber's systems, including information about its members.
The organization’s computer systems have since been revamped, according to Chamber spokesman J.P. Fielder.
The group said there has been no evidence of harm to its organizations or members.
The Chamber represents three million U.S. businesses, and its international division has long advocated for freer trade with China.
During the period in question, the Chamber’s Asia division was heavily involved in advocating for the South Korea free-trade agreement and against penalizing China with tariffs over its undervalued currency.
The Chinese were able to hack into the Pentagon’s computer system in June 2007, and the U.S. government has viewed cyber attacks from China as a top security threat ever since.