Three of the people were conscious, SOS Alarm reports. The condition of the fourth person is unclear.
An ambulance and an ambulance helicopter responded to the accident. The sequence of events is unclear; an initial alarm was received that people had been hit.
No one was hit, they all appear to have been in cars, says Fägersten at the rescue service.
"All people should be taken care of," he continues.
The alarm was received at 9:30 p.m. on Monday.
