The social networking giant Facebook is said to have experienced slow connections and up to 5 hours down-time when users tried to log on 14 January.
A Facebook representative acknowledged that some people were having trouble logging in, or slow speeds when navigating the site, reports The Register. The UK had up to 3 hours downtime and the issue also affected mobile platforms.
Facebook is said to be increasing its security procedures which could be the reason for the crash. In recent weeks, users have been asked to supply further personal data, including mobile phone numbers and additional email addresses.
Facebook founder, Mark Zuckerberg, announced that the user content generation site reached 300 million members last year. The company is said to be worth $50 billion when Goldman Sachs and Digital Sky Technologies invested $500 million in shares in January.
They will be keen to avoid any further disruption, like that of Skype last year, when server issues caused the video messaging company to be off-line for 24 hours.