(Adds quotes and background)
WASHINGTON, March 31 (Reuters) - The national security
advisers for the United States and the Philippines discussed
their shared concerns over Chinese activities in the South China
Sea in a call on Wednesday, the White House said.
The Philippines has described the presence of hundreds of
Chinese boats inside its 200-mile exclusive economic zone at
Whitsun Reef in the South China Sea as "swarming and
threatening." Manila believes the vessels were manned by maritime militia.
Chinese diplomats have said the boats were sheltering from rough
seas and no militia were aboard.
White House national security adviser Jake Sullivan and
Philippines national security adviser Hermogenes Esperon "agreed
that the United States and the Philippines will continue to
coordinate closely in responding to challenges in the South
China Sea," the White House said.
"Sullivan underscored that the United States stands with our
Philippine allies in upholding the rules-based international
maritime order, and reaffirmed the applicability of the
U.S.-Philippines Mutual Defense Treaty in the South China Sea,"
it added.
Canada, Australia, Japan and others have voiced concern
about China's intentions.
Brunei, Malaysia, the Philippines, Taiwan, China and Vietnam
have competing territorial claims in the South China Sea,
through which at least $3.4 trillion of annual trade passes.