A U.S.-based Internet security group is accusing the Chinese government of direct involvement in a sophisticated campaign of cyber attacks against American businesses, government and critical infrastructure.
A 60-page report released Tuesday by Mandiant details dozens of attacks by a prolific, China-based hacker group it says is using "direct government support" to wage a "long-running and extensive cyber espionage campaign."
Mandiant says the group, referred to as APT1, has stolen massive amounts of data from nearly 150 organizations, mostly located in the U.S., over the past seven years.
It says it has traced the activities of the group to a Shanghai neighborhood surrounding the headquarters of the People's Liberation Army's secretive unit 61398, which Internet security experts previously linked to cyber attacks.
China has not responded to the report. But in the past, it has said has denied such activity, saying it is also a victim of cyber attacks.