Swedish police say at least four people were killed when a car plunged more than 25 meters (82 feet) from a highway bridge into a canal in Sweden's capital of Stockholm.

Police spokeswoman Eva Nilsson said Saturday that divers were searching for a fifth person after they found out there might have been five people in the car. Nilsson said four bodies, all men, have been recovered so far. None were identified.

The cause of the accident on the E4 highway in Stockholm's Sodertalje district was not known.

Swedish media said it's believed the car smashed into a road barrier and then plunged into the water. At the time of the pre-dawn accident, the bridge over the Sodertalje canal was closing, with warning lamps flashing and two barriers down.