Law enforcement authorities from China, Laos, Myanmar, and Thailand joined forces Tuesday for the 106th Mekong River joint patrol, Xinhua reported.

Three Chinese vessels departed from Jingha Port in Xishuangbanna Dai Autonomous Prefecture in southwest China's Yunnan Province for the patrol.

Law enforcement officers from the four countries plan to navigate over 600 km of the Mekong River over four days and three nights to strengthen patrols of the river's pivotal waters and clamp down on drug trafficking and other cross-border crimes in the region.