French Interior Minister Gerard Collomb said the suspect in an attack at Notre Dame Cathedral in Paris Tuesday cried "it's for Syria" as he assaulted a police officer with a hammer.

The wounded officer fired twice at the hammer-wielding man in the square in front of the cathedral, French police told Fox News.The attacker was hospitalized. The specific conditions of both men are unclear.

Investigators are calling the attack an act of terror.

Speaking after the attack, Collomb said police found kitchen knives, a hammer and other unsophisticated weapons on the wounded assailant.

On social media, people reported that they were "trapped" in the cathedral during the incident. One person in the cathedral said officers instructed them to "raise their hands." French police later said they would be letting visitors out after conducting security checks.

It was the latest of several attacks in France targeting security officers. In April, an attacker opened fire on a police van on Paris' Champs Elysees, killing one and gravely wounding two others. The attacker was shot dead by police.

In March, a man was shot to death after seizing the weapon of a soldier guarding Paris’ Orly Airport. In February, soldiers providing security at the iconic Louvre museum were attacked by a machete-wielding man.

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