The Australian Police have arrested the man who drove a car into pedestrians on a pavement outside the Flinders Street railway station in Central Melbourne on Thursday, injuring at least 19 people, Reuters reported.

The man deliberately drove the white SUV into the crowd, the police said. He is of Afghan descent, is a drug user with mental health trouble, but does not have any known terrorism links, the BBC reported.

The police arrested another inividual who was seen filming the incident and had a bag of knives with him. Acting Police Commissioner Shane Patton told The Guardian the police have yet to find out whether the second man had any connection to the driver, or whether he was involved in the incident.

“We believe, based on what we have seen, that it is a deliberate act,” the police said, according to The Guardian. “The motivations are unknown. It is still the early days of the investigation.”