The Whatsapp application, on Tuesday morning, was shut down as the firm confirmed it was working to restore service as quickly as possible.
It became inaccessible to many users on Tuesday morning and several countries including Britain, South Korea and India have complained.
The popular app makes it possible for users to send messages and make phone calls free over the internet.
“We’re aware that some people are currently having trouble sending messages and we’re working to restore WhatsApp for everyone as quickly as possible,” Josh Breckman, a WhatsApp spokesman, said in a statement.
According to Downdetector.com, which tracks internet disruptions, the outage started around 3 a.m. Eastern time.
WhatsApp, which is owned by Meta, the parent company of Facebook, has more than two billion users around the world, the spokesman said. Facebook acquired WhatsApp in 2014 for $22 billion.
