Spanish media company Prisa evacuated its headquarters in Madrid Wednesday after the arrival of a suspicious package, a spokesman said, according to Reuters. Authorities examined the suspicious package and determined that it wasn't a threat.

Several onlookers took to Twitter to post photos of the scene outside the building, where police and evacuated personnel had congregated. Prisa media group owns the daily newspaper El País, the Spanish version of the Huffington Post, and several other properties.

The evacuation occurred shortly after a group of masked gunmen killed at least 12 people at the headquarters of French satirical magazine Charlie Hebdo in Paris. Charlie Hebdo has regularly published cartoons that mock the Prophet Muhammad and prominent Muslim leaders. The gunmen shouted “Allahu akbar” -- which means "God is great" in Arabic -- and other Arabic epithets during the attack, according to various reports. Television outlet iTélé recorded the gunmen saying, “We have killed Charlie Hebdo. We have avenged the Prophet Muhammad.”

French President François Hollande described the shooting as a “terrorist attack without a doubt,” while top officials said authorities were in pursuit of three suspected gunmen, the Washington Post reported. A portion of the attack was captured on video.

Hollande declared "an act of indescribable barbarity has just been committed today in Paris.

"Measures have been taken to find those responsible, they will be hunted for as long as it takes to catch them and bring them to justice."

This isn’t the first time that Charlie Hebdo was targeted for retribution after the publication of divisive content. The publication’s headquarters were firebombed in 2011 after it published an image of the Prophet Muhammad.

Spanish Prime Minister Mariano Rajoy joined the international outcry against the Charlie Hebdo shooting, expressing “condolences and solidarity” with the attack’s victims. Spanish authorities will hold an emergency anti-terror meeting at 6:30 p.m. local time, The Spain Report said.