China's military said on Wednesday it had monitored and warned a U.S. warship that had sailed through the sensitive Taiwan Strait, a mission that happened shortly after China carried out drills near the island.

The U.S. Navy's 7th Fleet said the guided-missile cruiser USS Port Royal conducted a "routine" Taiwan Strait transit through international waters "in accordance with international law" on Tuesday, the second such mission in two weeks.

The United States has been carrying out such voyages about once a month, angering China, which views them as a sign of support for Taiwan, the democratically governed island that Beijing views as Chinese territory.