As Ceaușescu was addressing the crowd from the balcony of the Central Committee building, sudden movement came from the outskirts of the massed assembly, as did the sound of (what various sources have reported as) fireworks, bombs or guns, which together caused the assembly to break into chaos. Initially frightened, the crowds tried to disperse. Bullhorns then began to spread the news that the Securitate was firing on the crowd and that a "revolution" was unfolding. This persuaded people in the assembly to join in. The rally turned into a protest demonstration.