WhatsApp faced a global outage in India and other countries with users being not able to send and receive text and video messages for more than an hour.
The services were restored for some users after the disruption that last over an hour.
A day after Diwali, several people on Tuesday were not able to send or receive messages on WhatsApp.
The Meta-owned messaging platform reportedly faced partial disruption, however, there was initially no official acknowledgment from the platform. WhatsApp later said it is working to restore services.
Outage detection website Downdetector showed that over 11,4300 users have reported on the platform that WhatsApp is down.
Downdetector tracks outages by collating status reports from a number of sources including user-submitted errors on its platform. The outage may have affected a larger number of users.
"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," a spokesperson for WhatsApp parent company Meta Platforms said on Tuesday.