A Chinese tourist broke her neck and died while sliding on a zip-line in the northern Thai city of Chiang Mai.
The 32-year-old woman was sliding down a 600-meter (2,000-feet) zip-line on Sunday when a worker failed to grab her during a maneuver to stop her from traveling further, police Col. Adun Somnuk said.
The staff rushed her to a hospital where they told doctors only that she had passed out while zip-lining, Adun told the Associated Press. But an autopsy later showed the woman, who was a doctor, had suffered a broken neck, he said.
Officers sent to inspect the zip-line operation are questioning the staff and witnesses, he said, adding that the staff could be charged with causing death by negligence if there is enough evidence.
Two other zip-line accidents have occurred in Chiang Mai this year.
In July, an American tourist broke several ribs after colliding with a Chinese tourist on a zip line. In June, a Chinese tourist fell to his death while sliding through a zip line due to a safety lock malfunction.