A tourist has been fined US$1000 for collecting water from a hot spring in Yellowstone National Park.
The incident follows a recent death at the park, when another tourist fell into a hot spring in a restricted area.
Officials said that a Chinese tourist was caught walking off a boardwalk and collecting water in the Mammoth Hot Springs thermal area on Tuesday.
The man was also seen breaking through a surrounding travertine crust, a fragile limestone deposit generated by the spring.
After being interviewed, the tourist said he had not read the safety information provided at the park entrance. He also admitted to collecting water from the spring.