BlackBerry's woes continue after a celebrity party, thrown by the company last night to celebrate BBM, ended in a vicious stabbing that forced police to lock celebrities inside the club and BlackBerry to cancel the event.

The BlackBerry event featured live performances from Jessie J and Wretch 32, and was held at the Bankside Vaults, London. Guests included TOWIE's Joey Essex and N-Dubz star Fazer. 

"Our first concern is the well-being of the individual concerned,” BlackBerry said in a statement. "We are doing all that we can to assist the police with their inquiries."

According to a report in The Daily Mail, BlackBerry had left no expense spared, laying on free drinks and canapés. But during a rush for the cloakroom a man in his 30's was apparently stabbed in the neck with a broken bottle. The injured man is said to be in a critical condition.

The celebrities were locked inside the club and only let out one at a time while officers took their names.

The BlackBerry phone has been struggling lately, and Apple has taken much of its success away with devices such as the iPhone, as well as RIM facing increased pressure from Google's Android platform. 

As well as being a tragedy to the injured-person, this is sure to be another PR-setback for the beleaguered company.