LONDON, July 3 (Xinhua) -- London has provided WiFi service for the first time in history on London's underground at more than 40 Tube stations and is being used by more than 100,000 passengers.

Launched four weeks ago by Virgin Media, the service was used to deliver one million Tweets, Facebook posts, emails and web pages in a single week, it was reported here on Tuesday.

This is the first time that commuters have been able to take advantage of the internet while underground.

Throughout the Olympic Games, passengers will be able to keep up with live travel updates, news and entertainment for free from Tube platforms.

The service is expected to be extended to 120 stations by the end of the year.