The temporary shutdown Wednesday of New York Stock Exchange trading, United Airlines flights, the Wall Street Journal website and other U.S. business activity likely was the result of a major cyberattack from China, according to a cyberwarfare intelligence analyst who contracts with the U.S. government and a chief investment officer who consults daily with cyber intelligence sources.

The New York Stock Exchange claimed the problem that caused a halt to stock trading for more than three hours was an “internal technical issue” and “not the result of a cyber breach,” while a Department of Homeland Security told CNN there is “no sign of malicious activity” at the NYSE or with the earlier outage experienced by United Airlines. FULL REPORT