Media playback is unsupported on your device Media caption Footage of the jump was originally posted on the Live Leak website

An American rapper has apologised for a "boneheaded" dive off a 35ft lighting rig during a London gig that put him and two of his fans in hospital.

According to a posting on his Facebook page, George Watsky injured a man and broke a woman's arm when he landed on top of them at Alexandra Palace.

The 27-year-old said his actions were "stupid and wildly irresponsible" and that he had "no excuse".

Footage of the jump and its aftermath has been posted online.

Image caption George Watsky is a rapper and 'slam poet' from San Francisco

The recording of Sunday's incident shows Watsky climb a rope ladder up to a gantry then leap off it, apparently without any warning.

Organisers halted the Vans Warped punk rock show so that the rapper and those he fell on could be stretchered out of the venue.

Watsky, who denied he was under the influence of drink or drugs, said he felt "terrible" and intended to apologise in person.

"Putting your own body on the line is one thing, but putting other people in harm's way is inexcusable," he continued.

The rapper, who hails from San Francisco, said he was "deeply sorry" and pledged to "learn from this mistake".