At noon, a horse-drawn wagon passed by lunchtime crowds on Wall Street and stopped across the street from the headquarters of the J.P. Morgan & Co. bank at 23 Wall Street, on the Financial District's busiest corner. Inside the wagon, of dynamite with of heavy, cast-iron sash weights exploded in a timer-set detonation, sending the weights tearing through the air. The horse and wagon were blasted into small fragments, but the driver was believed to have left the vehicle and escaped.