A van has struck at least eight people in Toronto, police have said, but the cause of the incident and the extent of the injuries are not yet known.

Authorities said the white van hit a crowd of pedestrians in north Toronto.

Police spokeswoman Meaghan Gray said the van apparently jumped the kerb, but the reason is not yet known.

The incident occurred on Monday as cabinet ministers from the G7 countries were gathered in the Canadian city to discuss a range of international issues in the run-up to the G7 meeting near Quebec City in June.

Police said the driver is in custody.

Paramedic spokeswoman Kim McKinnon said first responders are on scene treating multiple patients but would not confirm the number or severity of injuries.

Police have shut down the Yonge and Finch intersection following the incident and Toronto’s transit agency said it has suspended service on the subway line running through the area.