A fire broke out on Monday at a rest stop and gas station on Autobahn 45 near Hammersbach in Hesse.
A spokesman for the police in Offenbach announced that two dead people had been discovered.
According to this, a witness had reported an explosion at a gas pump at the gas station around noon.
According to the spokesman, the fire was extinguished.
The adjacent restaurant building was also affected.
The background to the incident was initially unclear.
According to initial police findings, two vehicles appear to have been involved in the incident.
One dead person was found in one of the cars, the second nearby.
The criminal police are on site and have started the investigation, the spokesman said.