Some 70 thousand Telegram users couldn’t sign in on Saturday as their accounts were marked ‘deleted’. The messenger app promises to fix the “server issue.”

Telegram users in Europe and North America started to report login problems beginning at 11:00 GMT on Saturday, according to Downdetector monitoring service.

The messaging app, which touts its exceptional security, reacted quickly by tweeting that “no data is lost? how is this possible if they don’t store your data?” during the outage and promised that “everything will be back to normal soon.”