A hacking group calling itself TeaMp0isoN took credit for the attack, which involved posting a statement on the BlackBerry blog before RIM removed it.
Security blooger Graham Cluley said Tuesday it wasn't clear whether the hackers managed to post on BlackBerry's blog because of a software vulnerability or because one of their administrators had his password cracked, the CNN reported.
The hack followed a statement Monday night on UK BlackBerry's Twitter feed that said,
A RIM spokesman issued a statement to the Guardian and other UK media saying the company would comply with a British law compelling it to hand over to authorities information from its encrypted network.
According to various news reports, many UK rioters have organized via BlackBerry Messenger, a free instant messaging tool that allows groups of smartphone users to communicate in private. The phones' relatively low price have made them popular with British youth; a recent survey by UK telecom research firm Ofcom found that 37% of British teenagers prefer BlackBerrys to other smartphones.