Human error 'likely cause' of Bulgaria bus crash

The bus was carrying tourists, including children, from North Macedonia returning from a weekend trip to Turkey.

Investigators have ruled out a terrorist act or that additional tubes with fuel on aboard could have caused the deadly fire. They also established there had been no explosion, head investigator Borislav Sarafov said.

Investigators are examining whether poor lane marking, lack of proper signs and reflectors, and poor organisation of highway traffic could have contributed to the accident, Sarafov said.