U.S. law enforcement has disrupted a second major Chinese hacking group nicknamed "Flax Typhoon" and wrested thousands of compromised devices from its grasp, FBI Director Christopher Wray said on Wednesday.

The FBI, NSA and other U.S. government agencies detailed a Chinese-government operation that used 260,000 of internet-connected devices to launch cyberattacks.

A hacker group known as Flax Typhoon was able to infect hundreds of thousands of devices around the world, authorities said. China has denied any involvement in the malicious botnet.