MANILA (Reuters) - The Philippines has assured Vietnam of a fair and thorough investigation into the deaths of two of its fishermen during a sea chase incident at the weekend, during which warning shots were fired by a navy ship.
Two crewman died and five were arrested on Saturday about 30 miles off Pangasinan, northwest of Manila, after the navy corvette came across Vietnamese vessels deep in the Philippines' 200 nautical mile exclusive economic zone, according to its foreign ministry.
The assurance was made by Foreign Secretary Alan Peter Cayetano to his Vietnamese counterpart in New York on the sidelines of the United Nations General Assembly.
"We would like to offer our sympathies over the unfortunate loss of life and give you our assurance that we will conduct a fair and thorough investigation into this matter," Philippine Foreign Ministry spokesman Robespierre Bolivar told reporters on Monday, quoting Cayetano.
The Philippines and Vietnam have been close diplomatic allies when it comes to the South China Sea, most of which is claimed by China. Malaysia, Brunei and Taiwan also have claims.
Vietnam's foreign ministry did not immediately respond to a request for comment.
The Philippines assured Vietnam the detained fishermen would be well treated.
According to the initial Philippine investigation, the navy ship spotted the six Vietnamese vessels by their bright fishing lights.
The boats sped away and the navy gave chase, but the corvette was then rammed by one fishing boat, the navy said, prompting sailors to fire warning shots. When the Vietnamese boat was caught, the crew surrendered and two fishermen were found dead.
Investigators noticed bullet holes in the boat's stockroom, but did not say if they were from the navy's guns.
(Reporting by Manuel Mogato; Editing by Martin Petty and Nick Macfie)