WhatsApp, a messaging service owned by Facebook Inc, said some users were still facing issues while accessing its messaging service.

The problems were primarily centred in the UK and Western Europe, according to DownDetector , a website that provides realtime overview of Internet and mobile services.

"We appear to be having issues again," a WhatsApp spokesperson told Reuters .

The company had earlier said that it had completely restored the service.

WhatsApp, however, did not provide any details on what led to the outage, which began shortly after 4.30pm UK time on New Year's Eve.

- Reuters