When Filipino forces assessed that the Chinese fishing vessel appeared to have run aground in the shallows east of Thitu Island on Saturday because of bad weather. Pic/ AFP
Confrontations have spiked between Chinese and Philippine coast guard and navy ships in the disputed waters in recent years
Thitu Island is home to a Philippine fishing village and Filipino forces and is the largest of nine islands and islets occupied by the Philippines
It lies about 26 kilometres (16 miles) from Subi Reef, which China transformed into an island base along with six other barren reefs to reinforce its claim to virtually the entire South China Sea
Vietnam, Malaysia, Brunei and Taiwan are also involved in the long-simmering territorial standoffs, an Asian flashpoint that many fear could pit China and the United States in a major conflict
The U.S. does not lay any claim to the South China Sea but has repeatedly warned that it's obligated to defend the Philippines, it's longtime treaty ally, if Filipino forces, ships and aircraft come under an armed attack, including in the South China Sea

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