Twitter warns of suspicious traffic coming from China, Russia
FILE PHOTO: People holding mobile phones are silhouetted against a backdrop projected with the Twitter logo in this illustration picture taken September 27, 2013. REUTERS/Kacper Pempel/Illustration/File Photo

Suspicious traffic to a Twitter Inc user forum appears to be part of a government-backed activity coming from China and Russia, a Twitter spokesman told Reuters via email on Monday.

The company does not know the reason for the activity, but notified users earlier on Monday out of an abundance of caution, the spokesman said.

Reporting by Jim Finkle in New York; Editing by Jeffrey Benkoe