The United States has no immediate plans to withdraw a mid-range missile system deployed in the Philippines, despite Chinese demands, and is testing the feasibility of its use in a regional conflict, sources with knowledge of the matter said.

The Typhon system, which can be equipped with cruise missiles capable of striking Chinese targets, was brought in for joint exercises earlier this year, both countries said at the time, but has remained there.

The Southeast Asian archipelago, Taiwan's neighbor to the south, is an important part of U.S. strategy in Asia and would be an indispensable staging point for the military to aid Taipei in the event of a Chinese attack.