Xinhua says it is unclear who hired the thugs, but that police detained four employees of the Fuyuan Hydropower Development company after the attack.

• 新华社说，是谁雇佣了这些流氓尚不清楚，但警察在攻击事件发生后拘留了水电站业主“富源水电开发公司”的四名雇员。