Police in the French capital arrested one man after a stabbing attack outside the former offices of the satirical newspaper Charlie Hebdo on Friday. The Paris Police later confirmed there were no other suspects being sought. French Prime Minister Jean Castex confirmed the attack, which police said had left four people wounded. Both victims, believed to be employees of a video production company that uses the office building, were left in serious but not life-threatening condition, according to the police. The Paris prosecutor's office opened a terrorism investigation into the stabbing not long after the suspect was apprehended on Friday. Elite police intervention units were on at the scene and a security cordon was quickly put up around the area. The building in the eastern 11th district of Paris was the scene of the deadly January 2015 attack carried out by brothers Saïd and Chérif Kouachi, who entered the offices on January 7 and killed 11 people, including eight Charlie Hebdo editorial staffers. As they fled the scene, the brothers killed a policeman who had been posted on guard outside the newspaper's offices, after it received numerous threats. Those threats related to Charlie Hebdo's publication of cartoons depicting the Prophet Muhammad. Muslims believe his likeness should not displayed or published, and millions took offense, sparking huge protests across the Muslim world.