In a statement released by his Spokesperson, António Guterres extended his condolences to the families of the victims, and reaffirmed “the solidarity of the United Nations with the people and the Government of France.”

A lone attacker armed with a knife entered the Notre Dame Basilica in the city centre at around 9am, according to news reports. A man and a woman died at the scene, while another woman died from her injuries. The attacker was injured after being shot by police and taken to hospital.

French authorities are treating it as a terrorist incident.