Beijing’s Foreign Ministry on Wednesday lashed out at reports that Chinese vessels may be conducting cargo transfers at sea with North Korean ships, in breach of UN resolutions.

Speaking at a regular press conference in the Chinese capital, Foreign Ministry spokesperson Hua Chunying challenged journalists to come up with more concrete details.

“I would like to know whether the relevant media could specify which ship or ships were involved in the situation? Are they on the sanctions list of the United Nations Security Council? If not, what made them conclude that these ships violated the Security Council resolutions?” Hua said.