WATCH ABOVE: The southbound 410 has reopened after a man died falling onto a van travelling on the highway. Ontario’s police watchdog is investigating. Priya Sam has more from the scene.

The Special Investigations Unit (SIU) said they have invoked their mandate after a man fell onto Highway 410 from Derry Road prompting the closure of all southbound lanes Friday morning, which have now re-opened according to OPP.

Monica Hudon, a spokesperson with the province’s police watchdog, said Peel Regional Police were initially called to the area at around 4:30 a.m.

“An individual called 911 to report that there was a man on the Derry Road overpass above Highway 410 acting in a suspicious manner,” Hudon said.

Hudson said when two Peel police officers arrived and exited their cruiser, the man fell from the Derry Road overpass onto the highway below.

A 27-year-old man fell on a van travelling in the southbound lanes of the highway and was pronounced dead at the scene, Hudon said.

Hudon added the driver was able to get out of the vehicle before it caught on fire. The driver was taken to hospital for assessment but did not sustain any serious injuries, Hudon said.

Mississauga Fire told Global News they received a call for a vehicle on fire on the highway near Derry Road at around 4:45 a.m. Friday.

Hudon said the SIU is investigating what transpired between the man who fell onto the highway and the officers.

The SIU is an independent enforcement agency that investigates incidents involving police that have resulted in death, serious injury or alleged sexual assault.

All southbound lanes on Highway 410 were reopened just before noon on Friday.

Source: Global News