KUNMING, June 26 (Xinhua) -- The 94th Mekong River joint patrol by China, Laos, Myanmar and Thailand concluded Friday as three Chinese law enforcement vessels returned home.

A total of 107 law enforcement officers from the four countries participated in the mission aboard four vessels, which navigated 654 km in four days and three nights, according to the Yunnan provincial public security department.

The three returning vessels rushed to join the rescue when the law enforcement officers were informed of a boat sinking in Xishuangbanna in Yunnan on Thursday, according to the department.

The Mekong River, known as the Lancang River in China, is a vital waterway for cross-border shipping among China, Laos, Myanmar, Thailand, Cambodia and Vietnam.

China, Laos, Myanmar and Thailand have been carrying out joint patrols on the Mekong River for eight years.