The Navy has yet to fully explain how or why the sub struck the seamount or to reveal the extent of damage to the Seawolf-class submarine.

China on Tuesday accused the U.S. of a “lack of transparency and responsibility” regarding an accident in the South China Sea involving a Navy submarine last month, AP reports.

At a daily briefing, Foreign Ministry spokesman Wang Wenbin said the U.S. should provide full details of the incident that has revived a dispute between the two countries over the strategic waterway.

“We once again urge the U.S. to give a detailed account of the accident,” he said.

Two U.S. Navy officials speaking on condition of anonymity on Monday said the service had determined the nuclear-powered USS Connecticut struck a seamount, or underwater mountain.

The Navy has yet to fully explain how or why the sub struck the seamount or to reveal the extent of damage to the Seawolf-class submarine.

Wang described what he called a “lack of transparency and responsibility” by the U.S. in following up with the incident.

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