UPDATE: 7:20 p.m. EST -- Periscope service to live streams coming out of France and Europe was restored around 7 p.m. EST. 

Original story:

SAN FRANCISCO -- Twitter's Periscope app crashed under heavy traffic Friday night after dozens if not hundreds of users in France took to the app to live-stream the sights and sounds coming out of Paris during an ongoing attack that has already reportedly claimed the lives of at least 60. The app, which launched this year, suddenly crashed around 6:30 p.m. EST.

On Twitter, Periscope said it was working hard to restore its services. Service appeared to have returned to users in North and South America but remained offline in France and the rest of Europe.