"A further 25 per cent report issues receiving messages and 14 per cent are struggling to login," Express.co.uk said.
Several users took to Twitter to confirm the development and vent their frustration with #whatsappdown trending on the micro-blogging site.
WhatsApp was also down in India and people were unable to connect with their friends or relatives.
People experienced a similar situation in May this year for a few hours in most parts of the world.
WhatsApp has 1.3 billion monthly active users globally with over 200 million users in India.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)