Tags: China

China's foreign ministry said on Tuesday that it was "extremely concerned" after leaders of Southeast Asian countries expressed worry about land reclamation and navigational freedom in the disputed South China Sea.

U.S. Secretary of State John Kerry told Japanese leaders on Monday that Washington's treaty commitments to Japan's security remain "iron-clad" and cover all territories under Tokyo's administration, including tiny islands in the East China Sea that China also claims.

The Philippines called on its Southeast Asian neighbors to unite in urging China to halt reclamation of land in the South China Sea, but the call failed to raise widespread support ahead of a regional summit.