Tragedy struck London once again, this time when a man used a van as a weapon of terror against a group of Muslims just after midnight Monday morning, leaving one man dead and ten others injured.

As Ramadan prayers ended, groups of Muslim worshippers scattered from the Finsbury Park Mosque in London. Witnesses report that a white van drove at high speeds down Seven Sisters Road before it veered into a crowd of Muslims on the sidewalk near the mosque. Witnesses were able to detain the suspect—a 48-year-old white male—until police arrived at the scene. Witnesses reported seeing two other men flee from the van, but police believe that the driver acted alone. Although police have not yet released the name of the man in question, the van displays the logo and telephone number of a van rental company in South Wales.

Police found one man dead at the crime scene, although his cause of death is still unknown. Witnesses report that the man had felt ill and collapsed in the street, and bystanders had begun giving him aid before the incident ensued. According to UK Prime Minister Theresa May, eight people required hospitalization, including two who incurred serious injuries. First responders treated two others with minor injuries at the crime scene.

Police are treating the attack as an act of terror and will continue investigation.