Thrill-seeking tourists in Jiaozuo, Henan province, got more than they bargained for when cracks appeared in a glass-bottom walkway suspended 1,080 meters over a canyon, reports said.

Images showing small cracks in the "skywalk" built around a mountain, which opened just two weeks ago, spread on social media along with doubts about its safety.

"When I was almost at the end, there was a sudden loud bang and a tremor beneath my feet," China.com.cn cited one woman as saying on Tuesday.

The cracks resembled "winter frost on a window pane", the report said, and were apparently caused by a dropped stainless steel cup.

But the incident at Yuntai Mountain in Henan "doesn't affect safety", park officials were quoted as saying.

The glass, made up of three layers, is supposedly capable of supporting up to 800 kilograms per square meter, they said.

The incident occurred during the weeklong National Day holiday period, when tens of millions take pleasure trips.

(China Daily 10/08/2015 page4)