China's defense ministry has defended its shelving of military talks with the United States in protest against House Speaker Nancy Pelosi's visit to Taipei last week, warning that Washington must bear "serious consequences," Reuters reported.

"The current tense situation in the Taiwan Strait is entirely provoked and created by the U.S. side on its own initiative, and the U.S. side must bear full responsibility and serious consequences for this," defense ministry spokesman Wu Qian said in an online post.

One U.S. official noted that Chinese officials had not responded to calls from senior Pentagon officials amid the tensions last week, but that they did not see this as a formal severing of ties with senior figures, such as U.S. Defense Secretary Lloyd Austin.

Asked directly about those reports, defense ministry spokesman Wu said, "China's relevant counter-measures are a necessary warning to the provocations of the United States and Taiwan, and a legitimate defense of national sovereignty and security."