"A large oil spill in northwest China has heavily polluted a tributary of the Yellow River, and threatens to reach one of the country’s longest and most important sources of water.
China’s state-run news media said late Saturday that a “large amount” of diesel oil had leaked out of a pipeline last Thursday in Shaanxi Province.
The government has not explained why the report of the spill was not released until late Saturday. But Xinhua, the official state news agency, said the leak was caused by construction work and that a crew of 700 people was struggling to contain the damage from what Shaanxi officials said was about 150,000 liters, or about 40,000 gallons, of diesel oil."
Link to NYT