NINGXIA HUI, China (CCTV/CNN) - A 30 meter-high blaze occurred on Friday afternoon in northwest China's Ningxia Hui Autonomous Region after a valve on the West-East natural gas pipeline was damaged.

Rescue workers closed the upstream valve immediately after the accident and firefighters were able to extinguish the fire after five hours.

The accident is still under investigation.

The pipeline, with a diameter of 10.16 meters, delivers 12 billion cubic meters of natural gas per year. It covers areas such as the Central Plains, east China and the Yangtze River Delta.