Paris, Jan 07 (ANI): According to the reports, at least 12 people were killed and 10 wounded after masked gunmen stormed the offices of a French satirical magazine Charlie Hebdo in Paris on Wednesday. Police and emergency personnel rushed to the scene to take victims to medical attention. Reportedly, a cartoon mocking ISIS leader Abu Bakr al-Baghdadi was tweeted by the French magazine Charlie Hebdo just an hour before the gunmen bursted into their offices. French President Francois Hollande arrived at the scene of a mass shooting which took place at the Paris offices of Charlie Hebdo. Hollande called the slayings a "terror attack", according to Prime Minister's office. Separately, the government said it was raising France's national security level to the highest notch.