Twitter, Inc. its social networking site was down Thursday owing to a system change. The outage last about two, hours news reports said.

Users from the U.S. to Asia to Europe were reporting problems, according to Ookla, LLC's Downdetector program.

There was nothing to suggest the problem was caused by a security breach or a hack. "We had some trouble with our internal systems and don't have any evidence of a security breach or hack," Twitter said in a statement.

In July, Twitter said hackers broke into its system and hijacked some of its posters' accounts including U.S. presidential candidate Joe Biden and reality TV star Kim Kardashian.

"With the U.S. presidential election looming, Twitter and other social-media companies have pledged to prevent the spread of false and misleading information, as it could impact voter turnout and how people learn about the results. The social-media companies were widely criticized for not doing enough to stop misinformation efforts around the 2016 U.S. presidential campaign," The Wall Street Journal reported late Thursday.

Microsoft Corp. and Alphabet Inc.'s Google recently experienced disruptions and in August, Zoom Video Communications Inc.'s videoconferencing service crashed for a couple of hours.

The U.S. Federal Communications Commission on Thursday said it would start introducing rules that might reduce legal protections for social-media companies. U.S. President Donald Trump has called for new rules after Twitter added fact-checking labels on some of his tweets.