Seoul says the scuffle happened after South Korean officials ordered the Chinese vessel to stop for an inspection Monday morning in the Yellow Sea.
South Korea's coast guard says one official's head was cut but his condition isn't life-threatening. Officials say two other South Koreans received minor injuries, and another was rescued after falling into the water.
The officials returned to their own vessel and contacted the coast guard, which says it captured the fleeing Chinese sailors. The coast guard is investigating whether the crew was illegally fishing in South Korean waters.