Research in Motion
BlackBerry and PlayBook developer Research in Motion. Shares have vaulted since Thursday.

A RIM employee has died after being attacked at the BlackBerry 'BBM' party, which was attended by many celebrities and featured a live performance by Jessie J.

Phillip Sherriff, 37, died in the early hours of Sunday morning at the Royal London Hospital after being attacked at the Pulse nightclub in London on 4 April.

Police have confirmed that Ashley Charles, 25, was remanded in custody and charged with the attack, which police are now treating as attempted murder. Charles will appear at London Crown Court on 20 April.

Sherriff was married with two children and police have confirmed that the next of kin have been made aware of his death.

Jessie J tweeted after the hearing of the death: "I am lost for words. All I can say is my thoughts, love and respects are with the family and children of the man who attended the BlackBerry gig last week who sadly lost his life this morning...So sad."

During his four-day battle for life medics were forced to operate on Sherriff's skull to remove pressure from an injury on his brain, but he died on Sunday morning.

Charles appeared at Camberwell Green Magistrates' Court on Saturday, but only spoke to confirm his name and date of birth.

RIM was unavailable for comment.