Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. April 11, 2012 Philippines Warship, Chinese Vessels in Standoff VOA News Philippine Navy flag officer-in-command vice admiral Alexander Pama presents to the media an undated file photo of a Chinese surveillance ship which blocked a Philippine Navy ship from arresting Chinese fishermen, April 11, 2012. Photo: Reuters Philippine Navy flag officer-in-command vice admiral Alexander Pama presents to the media an undated file photo of a Chinese surveillance ship which blocked a Philippine Navy ship from arresting Chinese fishermen, April 11, 2012. The Philippines said Wednesday one of its warships is engaged in a standoff with two Chinese surveillance vessels that blocked the arrest of Chinese fishermen in disputed waters of the South China Sea. The Philippines foreign ministry said the standoff began Tuesday when Manila's flagship naval vessel, the Gregorio del Pilar, confronted eight Chinese fishing boats near a disputed shoal off the northwest province of Zambales. It said the two Chinese surveillance vessels then positioned themselves between the Philippines Navy ship and the fishing vessels, "preventing the arrest of the erring Chinese fishermen." The Philippines summoned Ma Keqing, the Chinese ambassador in Manila, for talks on Wednesday, saying it preferred to resolve the dispute diplomatically. China has not commented on the issue. Both countries claim ownership of the shoal, which is known as Panatag in the Philippines, and as Huangyan Island in China. Tensions in the region have risen in recent years as China becomes increasingly assertive about its claims over the entire 3.5 million-square-kilometer South China Sea, which is thought to be rich in oil and gas. There has been a series of run-ins involving fishermen, military patrols, and other vessels in the disputed waterway, parts of which are also claimed by Vietnam, Malaysia, Brunei and Taiwan. Some information for this report was provided by AP, AFP and Reuters. .