上个月，河内指责在该海域中国侦察艇切断了其一艘石油探测船的电缆。

Hanoi last month accused Chinese surveillance vessels of cutting the exploration cables of an oil survey ship inside the area.

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海岸警卫队也额外获得了20艘快速巡逻艇，41艘拦截艇，12架沿海侦察飞机和7艘离岸巡逻艇。

The coast Guard is also acquiring additional 20 fast patrol vehicles, 41 interceptor boats, 12 coastal surveillance aircraft and seven off-shore patrol vehicles.

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该发言人称，日本巡逻艇当时正在该国专属经济区巡逻，在发现中国侦察船之后继续留在了该海域。

The spokesman said the Japanese vessel was operating in Japan's exclusive economic zone and remained in the area after finishing the survey.

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