... by sending a third ship to the area. From Fox News:
The Philippines on Friday accused China of escalating the countries' 10-day standoff in the disputed South China Sea by sending a third patrol vessel to a shoal where both sides claim sovereignty.
The standoff at the Scarborough Shoal, sparked April 10 when the Philippines accused Chinese fishermen of poaching in its territory, is being closely watched to see how far Beijing will go in its increasingly assertive stance on territorial claims in the region. The South China Sea is home to a myriad of competing claims, also involving Vietnam, Brunei, Malaysia and Taiwan.
The latest Chinese patrol vessel was dispatched after the Philippines refused to withdraw its coast guard ship from Scarborough Shoal, China's state-run Xinhua news agency said.
Philippine Foreign Affairs spokesman Raul Hernandez told a news conference in Manila that China's move was seen as an escalation of the standoff originally sparked when two Chinese maritime surveillance ships prevented a Philippine warship from arresting several Chinese fishermen. The fishermen slipped away from the shoal, angering Philippine officials.
The Philippines subsequently replaced the warship with a smaller coast guard vessel that was facing off with the two Chinese ships, with each side demanding the other pull out first.
Hernandez said that his government plans to ask China's representatives why they violated an earlier agreement not to aggravate the situation.