Servers of Telegram messaging app went down in several areas around the world on Saturday.
Regions affected most by the problem included Iran, Oman, central Europe, Australia and California, news website Khabar Online reported.
Following the incident, several users took to Twitter for posting tweets directed at Telegram CEOs to urge them to look into the issue.
Telegram is a widely popular social media application in Iran with nearly 15 million active users, according to Abolhassan Firouzabadi, the secretary of Iran’s Council of Cyberspace.
The issue of filtering the app has repeatedly been denied by the Ministry of Communications and Information Technology’s officials.
“The ministry has not placed a ban on the application and the source of recent problems is outside Iran,” Mehr News Agency quoted Mohammad Reza Farnaghizad, the ministry’s head of public relations, as saying in a statement.
The official added that the domestic telecommunication infrastructures or access networks face no problems.
Some media outlets have speculated that due to the New Year holidays abroad, offices might not be working at full potential because of which it has taken longer for the issue to be solved.
In a later update posted by Khabar Online, the slowing down of Telegram servers was reportedly solved by Saturday evening.
Users of another highly popular messaging app, WhatsApp, have also been experiencing trouble using the service.
As New Year Eve parties were getting underway across Europe, with people messaging friends and relatives to coordinate when to be where, WhatsApp also went down for some users.
The Facebook-owned messaging service has over 900 million users and troubles connecting to the service were widely reported across Europe on Dec. 31.
“Some people have had trouble accessing WhatsApp today,” a WhatsApp spokesperson told Quartz. “We’re working to restore service back to 100% for everyone and we apologize for the inconvenience.”
WhatsApp did not say what had caused the issue.