The driver of a Belgian bus that crashed into a Swiss motorway tunnel in March suffered from heart problems, according to a new report.
But investigators say it’s impossible to say whether his health issues caused the accident.
22 children and six adults were killed when the coach ploughed into a tunnel wall at 100 kilometres an hour.
No traces of alcohol or illegal drugs were found in the driver’s blood.
He had complied with requirements to take a break from driving, according to the report.
The identity of driver has not been released.