Vietnamese state-run television has broadcast images of a collision between Vietnamese and Chinese vessels in the South China Sea.
The report says Chinese ships surrounded a Vietnamese government surveillance vessel on Monday morning and sprayed it with water.
The images show a boat bearing a Chinese-language name hitting the Vietnamese boat. The footage shows large hole in its hull of the Vietnamese boat.
The report says no crewmembers were injured.
The incident occurred just over 21 kilometers southwest of where a Chinese oil firm has installed an oil rig.
Vietnamese authorities say about 120 Chinese ships have been deployed in the area to support the oil drilling operation.
Negotiators from China and Vietnam met in Hanoi last week, but failed to overcome their differences.
Jun. 23, 2014 - Updated 23:17 UTC