Other apps like Tinder and Reddit also experienced simultaneous outages
Encrypted instant messaging app Signal was hit by a brief outage late Sunday.
The technical mishap interrupted services on the platform at the same time as localized outages on other social media services.
Signal blamed hosting issues for the disruption, which internet outage monitor DownDetector said began at 11:05 pm Eastern Standard Time, citing user reports.
The site logged reports of interrupted service in the United States, Europe, Hong Kong and other parts of the world.
Service largely returned to normal by 3:00 am according to Signal's developers.
The app is now fully operational, with Signal’s official Twitter account confirming resumed service.
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The outage coincided with "degraded performance" in a cloud server owned by Amazon Web Services (AWS) in northern Virginia, the firm said.
"We can confirm that the deployed mitigation has worked and we have started to see recovery," AWS said in a status report on the disruption.
DownDetector users reported simultaneous outages with some other apps, including dating platform Tinder and popular news and discussion forum Reddit.
First launched in 2014, Signal saw a large surge in downloads earlier this year after Facebook-owned messaging service WhatsApp tweaked its terms of service and sparked privacy concerns.
The social media giant encountered pushback in the past regarding it's privacy breaches in the Cambridge Analytica data scandal, leading many to turn to more secure digital alternatives.