(BBC) – Up to 10 pedestrians have been struck by a van that witnesses said mounted the kerb in Toronto, say police.
The vehicle fled the scene after the incident at a busy intersection in the north of the Canadian city, police say.
The van was located several blocks away, and the driver was taken into custody, according to local media.
Police have yet to confirm any fatalities, but witnesses told Canadian media a number of people appeared to have been killed in the incident.
Toronto’s Sunnybrook hospital says it has received seven patients so far, and has locked down its emergency centre as an “added precaution”.
The incident happened at Yonge Street and Finch Avenue at 13:30 local time (17:30 GMT) on Monday.
The crime scene encompassed a 2km (1.24 mile) stretch of Yonge Street in Canada’s largest city.
It happened about 18 miles (30km) from the downtown area where the Group of Seven foreign ministers of industrialised nations – including Canada, US, Britain, France, Germany, Italy and Japan – were holding meetings.
Pictures apparently taken at the scene show police armed with rifles and paramedics treating injured people.
One orange bag, which appears to contain a body, is seen being loaded on to an ambulance.
Toronto police spokeswoman Jenifferjit Sidhu told CBC News that the vehicle was stopped by police.
No description was given of the driver, including name, age, gender, or possible motive.
Canadian Prime Minister Justin Trudeau tweeted from Ottawa: “Our thoughts are with all those affected by the terrible incident at Yonge and Finch in Toronto.”