China demands US response over CIA hacking claims
The allegations were made by Qihoo, a well-known cyber-security firm based in Beijing.
The company said it had found evidence in malware suggesting the CIA had targeted airlines, petrol companies and government agencies.
The BBC has contacted the CIA for comment. Qihoo said it had analysed malicious code and found similarities between it and information about alleged CIA hacking tools which was published three years ago. Among other alleged targets of the hacking campaign were internet firms, scientific institutions and energy companies. "We speculate that in the past 11 years of infiltration attacks, CIA may have already grasped the most classified business information of China, even of many other countries in the world," added Qihoo.