Singer Jessie J, who performed at the BlackBerry-sponsored party, says she is "lost for words" at the news of a fatality resulting from a stabbing at the event.
Phillip Sherriff, 37, died in hospital this morning after a four-day battle to save his life.
I am lost for words. All I can say is my thoughts, love and respects are with the family and (cont) http://t.co/s7yrrC19
Her full statement reads:
"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..."
More top news
We'll have to wait until the weekend but by then it will be warming up.
Facebook says it will start test flights later this year of a solar-powered drone that aims to provide remote areas with the internet.
Children's charity Kids Company is being investigated by the Metropolitan Police over criminal allegations.