Five Dead After Runaway Train Explodes

Authorities plan to pick up the search for 40 missing people today after an unmanned runaway train, pulling 72 tankers filled with crude oil, plowed into the town of Lac-Megantic, Quebec before it derailed and exploded.

The fire burned for 36 hours and at least five people were killed.

“Those tankers full of crude oil have finally been extinguished,” CNN's Paula Newton reports. “This means investigators can move in and unfortunately start the grim work of looking for the missing.”

According to The Montreal, Maine & Atlantic Company, the cause is unknown but most likely due to a brake failure.

Follow along at CNN.com for developments.