New Delhi, July 1 -- Two people were arrested on Wednesday after climbing to the top of the Empire State Building's 1,454-foot (443-metre) antenna, unfurling a peace banner, and appearing to stage a marriage proposal before descending.

Dressed in black and wearing masks, the pair balanced on a narrow ledge high above Midtown Manhattan without visible safety tethers. They displayed a banner reading: "When the power of love beats the love of power the world knows peace."

News helicopter footage showed the pair kissing near the top of the antenna before beginning their descent shortly after 12:30 p.m.

As they climbed down the metal latticework to a wider platform, one of the climbers appeared to kneel and present the other with what looke...