Irish rock group U2 have played to thousands of fans at a surprise concert under New York's Brooklyn Bridge.
U2 played the surprise live set to thousands of fans
Fans said they heard about the show, which was not widely advertised, on the internet or by word of mouth.
The quartet, fronted by Bono, played songs from their newly-released album How To Dismantle An Atomic Bomb in the shadow of the New York skyline.
The band spent the day performing around the city on a flatbed truck, being filmed for their new video.
Their appearance brought traffic to a standstill in central New York, while Bono sang an impromptu rendition of Santa Claus Is Coming To Town in Times Square.
The video was being filmed for their forthcoming single All Because Of You the follow-up to U2's recent UK chart-topper Vertigo.
Their 11th studio album has only just been released, but fans sang along at the 45-minute gig.
Some members of the crowd made a special effort to get to the event in the park, which is situated between the Brooklyn and Manhattan bridges.
Deb Pruitt, from Culpeper in Virginia, left her home at 4am to see the show.
"It's totally worth it not to sleep at all and drive eight hours to be here," she said.
The concert was recorded for MTV and is due to be screened next month.