A nine-year-old child and an adult male are dead, and four others in hospital after a crash north of Toronto on Sunday.

York Regional Police received the call for a multiple-vehicle collision near Kirby Road and Kipling Avenue in Vaughan shortly after 4 p.m. on Sunday.

A 65-year-old man was pronounced dead at the scene.

Three children and one adult were transported to a Toronto trauma centre in life-threatening condition. Another person was also taken to hospital with non-life-threatening injuries.

One child, who police say was nine years old, was pronounced dead in hospital. 

Two other children remained in hospital Sunday night in life-threatening condition. The two adults in hospital have been listed in serious but stable condition. 

A 29-year-old man was arrested at the scene on suspicion of impaired driving but has not been formally charged. Police say the man will appear in a Newmarket court on Monday morning.

Speaking to reporters on Sunday night, Const. Andy Pattenden called this collision “truly the worst-case scenario.” 

“It’s going to take a long time to piece together exactly what happened,” Pattenden said. 

The intersection was closed for several hours while police investigated but was in the process of reopening overnight Sunday. 

Police are asking anyone with information about the collision to contact them at 1-866-876-5423.