A、A bus explosion at a ski resort in Tokyo. B、A devastating landslide near Karuizawa. C、A bus crash on a mountain road in Japan.

A bus taking passengers to a ski resort in central Japan has dropped from a mountain road, killing 14 people and injuring 27. The bus, with 41 people on board, was traveling overnight from Tokyo to a resort in Nagano prefecture. The accident happened near the town of Karuizawa early on Friday. It is not immediately clear what caused the crash as there was no snow or ice on the road. Japan’s Transport Ministry has launched an investigation. Twenty-seven people were injured when the bus strayed onto the wrong side of the road and smashed through a guardrail, sliding several meters down the mountainside. Skiing and other winter sports are popular in Japan, which has extensive mountain ranges accessible from many of the country’s biggest cities. Many people heading to the mountains use a bus for at least part of their journey.
3. What is the news report mainly about?
4. Who is responsible for investigating the incident?