Tourism to Taiwan may take another blow, on top of the already declining number of mainland visitors, following the end of a probe into the bus blaze on July 19 that killed 26 people, experts say.

Investigators concluded on Saturday that the driver intentionally caused the deadly incident.

On Saturday, the Taoyuan District Prosecutors' Office, making public the findings of its probe, said bus driver Su Ming-cheng set himself alight using gasoline with a group of 24 mainland tourists and one tour guide on board.