China is hitting back at the U.S. over accusations of hacking, arguing that American officials have orchestrated their own attacks on China.

A recent report from Mandiant, which accused the Chinese military of carrying out cyber attacks on U.S. and other targets, is factually inaccurate and unprofessional, China’s Ministry of Defense said during a recent press briefing.

The agency pointed to the growing number of cyber attacks on the Chinese Defense Ministry and Chinese military websites. Examining the IP addresses of the attackers in 2012, the Chinese determined that 62.9 percent came from the U.S., the ministry said in a translated statement.

Last week, the state-controlled Xinhua news agency quoted Foreign Ministry spokesman Hong Lei as saying that in 2012, “about 73,000 overseas IP addresses controlled more than 14 million computers in China and 32,000 IP addresses remotely controlled 38,000 Chinese websites.”

Those plans “are not conducive to the joint efforts of the international community to enhance network security. We hope that the United States [is] made to explain and clarify,” according to the translated statement.

Report author Mandiant, meanwhile, said in a Wednesday blog post that it has further evidence to support the assertion that the Chinese military is linked to prolific hacker group APT1, pointing to a phone number that links the groups.