LONDON — Concert organizers pulled the plug on rock stars Bruce Springsteen and Paul McCartney after the pair defied the sound curfew at London's Hyde Park, silencing their microphones at the tail end of the show.

Springsteen had already exceeded the 10:30 p.m. curfew by half an hour Saturday night when he welcomed McCartney on stage and the pair sang the Beatles hits "I Saw Her Standing There" and "Twist and Shout." But the microphones were turned off before they could thank the crowd, forcing them to leave the stage in silence.

A statement from concert organizer Live Nation said it was unfortunate that Springsteen's three-hour-plus performance was stopped "right at the very end," but it said that the curfew had been laid down by the authorities "in the interest of the public's health and safety."

Huge concerts in Hyde Park, a 350-acre (140-hectare) expanse of landscaped garden and parkland that abuts some of London's wealthiest neighborhoods, have increasingly caused friction between fans and the area's well-heeled residents, many of whom gripe about the late-night noise and nuisance.

With complaints on the rise, local officials have decided that as of next year, the number of concerts will be slashed from 13 to nine. Also in 2013, they plan to reduce crowd limits from 80,000 to 65,000.

Steven Van Zandt, who plays guitar in Springsteen's E-Street Band, criticized Saturday's decision as heavy-handed.

"English cops may be the only individuals left on earth that wouldn't want to hear one more from Bruce Springsteen and Paul McCartney!" he wrote on Twitter. "On a Saturday night! Who were we disturbing?" Finally he added: "There's no grudges to be held. Just feel bad for our great fans. ... It's some City Council stupid rule."

London's flamboyant mayor, Boris Johnson, said Sunday that the singers should have been allowed to keep going.

"It sounds to me like an excessively efficacious decision," he told London radio. "You won't get that during the Olympics. If they'd have called me, my answer would have been for them to jam in the name of the Lord!"

Selections From Paul McCartney's Kisses on the Bottom:
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  • Paul Mc-Cartney Only Our Hearts

    Paul McCartney - Kisses On the Bottom 14 - Only Our Hearts

  • My Valentine iTunes Live

    Live from Capitol Studios 9 February, 2012. Kisses On The Bottom is available now store.paulmccartney.com Mastered For iTunes: www.itunes.com

  • Sir Paul McCartney on His New Song "My Valentine" (at iHeartRadio)

    Sir Paul McCartney gives us an inside peak into the writing and title of his new song "My Valentine" and his new album "Kisses On The Bottom" at iHeartRadio

  • Paul & Tommy LiPume discuss Kisses On The Bottom (extended)

    Paul McCartney's new album 'Kisses On The Bottom' is set to be released on 6th/7th February. Pre-Order: store.paulmccartney.com Mastered For iTunes: www.itunes.com

  • PAUL McCARTNEY My Valentine Video KISSES FROM THE BOTTOM Vol.1

    My Valentine video, press conference in London highlight, Good Evening Europe highlights with Monkees song, Klaus, Astrid and Ringo backstage and more!

  • Paul At The Photoshoot For Kisses On The Bottom

    Kisses On The Bottom is released today... Out Now: store.paulmccartney.com Mastered For iTunes: www.itunes.com

  • Paul McCartney - I'm Gonna Sit Right Down And Write Myself A Letter - (Kisses On The Bottom)

    Custom Made Music video in HD with original sound track on the album that is third in the Album charts of this week of release. Enjoy

  • PAUL McCARTNEY KISSES FROM THE BOTTOM 2012 VOL.3

    This is an interview given the day after Paul rec'd his star on thye Hollywood Walk of Fame and then off the MusiCares Person of the Year event and then the Grammy Awards! What ab busy guy! There is so much more - but this is a sample - enjoy - see My One and Only Love for "In Performance" footage from the internet telecast! Kisses On The Bottom Macca's latest release BUY IT NOW!

  • Jamie Cullum interviews Paul McCartney about Kisses On The Bottom

    Paul met Jamie Cullum for a very special, in-depth interview about his brand new album Kisses On The Bottom, a collection of standards that Paul grew up listening to as a child that went on to inspire him as a songwriter and his love of jazz. This exclusive interview is to be aired on Jamie's weekly jazz show on Tuesday, 7th February 2012 at 7pm. Pre-Order: www.itunes.com store.paulmccartney.com

  • Hear the truth with Paul McCartney JBL [official commercial]

    Check out the new JBL commercial featuring the 14-time GRAMMY winner, and 2012 MusicCares recipient, Paul McCartney. A life-long user of JBL equipment in the studio, on tour and at home, McCartney's appearance as a JBL "Hear the truth" artist is a testament to the enduring impact the brand has had on musicians and music fans since the dawn of the rock era. The video features his new single, "My Valentine," from the album "Kisses on the Bottom," which was released on February 7, 2012.