Chinese foreign ministry spokesperson Zhao Lijian said on Monday that the U.S. should clarify an incident involving a U.S. nuclear submarine, including the exact location of the incident, the intention of the U.S. navigation, details of the incident, what the submarine collided with, whether it caused nuclear leakage, and whether it damaged the local marine environment.

The U.S. should show a responsible attitude and make a detailed explanation of the accident as soon as possible to give a satisfactory account to the international community and regional countries, Zhao added.