WATCH: A witness was able to capture masked gunmen shooting a Paris policeman after they stormed the offices of a satirical newspaper, in France's deadliest terror attack in at least two decades.
This footage uploaded online shows the two gunmen responsible for 12 deaths in Paris. One shoots and kills a police officer during their attack. Watch.
Xavier Castaing, head of communications for the Paris police prefecture, confirmed the deaths.
French President Francois Hollande was headed to the scene of Wednesday's shooting at Charlie Hebdo, a satirical weekly that has drawn repeated threats for its caricatures of the Prophet Mohammed, among other controversial sketches.
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