Millions of Blackberry owners across Europe, the Middle East and Africa have been left without services following a server crash.

Owners of the smartphones were unable to browse the web, send email or instant messages.

The problem appears to have originated in a data centre in Slough which handles Blackberry services for the affected regions.

Blackberry UK said it knew about the problem and was "investigating".

In a tweet sent around 14:42 BST, the company said: "Some users in EMEA are experiencing issues."

A subsequent statement said Blackberry was: "working to resolve an issue currently impacting some Blackberry subscribers in Europe Middle East and Africa."

It apologised for the inconvenience that the ongoing problem was causing its customers.

Earlier on 10 October mobile operators in the UK, Egypt, Kuwait, Qatar and other nations pointed the finger at Blackberry owner RIM when replying to tweets from customers complaining about the problems.

Business and consumer

Many corporate customers said they had not lost service, suggesting that the problem was with Blackberry's BIS consumer systems, rather than its BES enterprise systems.

"Blackberry runs two infrastructures," explained Simon Butler, a Microsoft Exchange consultant at Sembee.

"The understanding I have is that the BIS service has crashed.

"The business side runs on a different set of servers, although enterprise Blackberrys can still use messenger and the consumer services, so they are also affected," said Mr Butler.

Such a major outage will still come as unwelcome news to Blackberry's owner RIM, which has been losing market share to smartphone rivals - in particular Apple's iPhone.

Many corporate clients have switched to the device after Apple made a concerted effort to improve its support for secure business email systems.

"If you have got companies that are shifting their allegiance to other players in the market and you stop being able to provide them that concrete, reliable service, then that's going to have a detrimental effect," said Stuart Miles of Pocket-Lint.com.

Online complaints

The first signs of trouble emerged about 11:00 BST but seemed to have escalated with tags about Blackberry and its BBM service trending on Twitter.

The only functioning service on Blackberry seemed to be text messaging, prompting many users to voice their frustration online.

In an early report, The Daily Telegraph quoted one Twitter user as suffering "serious Blackberry outrage".

Others lamented the loss of the free BBM network saying they did not know what to do without it.

Sounds similar to the T-Mobile Sidekick crash of 2009