A boy who was left inside a vehicle in the west end has died.

The boy, who sources told CP24 is believed to be between two and three years-old, was reportedly found around 1:30 p.m., in a vehicle parked in the Burnhamthorpe and Mill Road area, on the border of Mississauga and Etobicoke.

A woman working in the building said the child was found by a cleaning crew visiting the building.

After being located, witnesses say police tried to resuscitate the boy who was rushed via emergency run to a local hospital where he succumbed to his injuries.

The vehicle where the boy was believed to have been found, a burgundy Hyundai Sonata sedan, had a window that appeared to be smashed open.

A dark-coloured car seat could be seen nearby. A small pair of blue shoes could be seen near the vehicle.

Police said one person is in custody in connection with the incident, but no charges have been laid. Police will not say how long the child was in the car.

Environment Canada said temperatures reached 27 C in the city this afternoon.