As previously reported, it had emerged that a man was in a serious condition after being stabbed in the neck at a BlackBerry sponsored event in London on April 3.

It is said Jessie J had already performed at the event before the incident happened.

The BBC reports that 25-year-old Ashley Charles from Leicester has been charged with attempted murder in relation to the incident.

The victim, a 37-year-old man, remains in a serious condition in hospital.