LONDON –  Hackers defaced a website belonging to Blackberry maker Research in Motion Tuesday afternoon, after the company said it would aid London police investigating several days of rioting that have already led to one death.

Police investigating the extraordinary escalation of London's rioting and disorder believe that instant messages sent via Blackberry smartphones played a vital role in coordinating the riots. Patrick Spence, managing director at manufacturer Research in Motion (RIM), said the company had reached out to police to offer its aid, potentially turning over messages from rioters.

Hackers promptly took issue with that plan, defacing a blog run by RIM in retaliation.

"No Blackberry you will NOT assist the police," wrote one member of the hacker group TeaMp0isoN, which claimed responsibility for the hack.

The Blackberry blog was briefly taken offline and subsequently restored to its original state, but an archive page of the hack reveals an angry message from a TeaMp0isoN hacker who calls himself Trick.

"You Will _NOT_ assist the UK Police because if u do innocent members of the public who were at the wrong place at the wrong time and owned a blackberry will get charged for no reason at all, the Police are looking to arrest as many people as possible to save themselves from embarrassment."

The hacker claimed to have accessed RIM employee information, including addresses, names, and phone numbers.

"If u assist the police, we _WILL_ make this information public and pass it on to rioters …. do you really want a bunch of angry youths on your employees' doorsteps?"