AN agreement between Hong Kong and the Philippines to enable fugitives wanted for serious crimes such as drug trafficking, murder and kidnapping to be extradited was yesterday approved in Manila by President Fidel Ramos. Mr Ramos is now expected to submit the agreement for approval by the Senate. A Hong Kong Security Branch spokesman said the treaty had been approved by the Executive Council and was now with the Joint Liaison Group in order to be approved by the Chinese side. ''The treaty is a bilateral agreement between Hong Kong and the Philippines and is designed to remain in force after 1997. Therefore, it has to be approved by the Chinese before it can be signed into law. ''Obviously, we are pleased with the progress in Manila and as the Hong Kong Government is happy with the treaty, it is now up to the Chinese side to give their approval.'' Historically, Hong Kong was covered by extradition treaties signed by Britain, but with the change of sovereignty approaching only treaties negotiated by the territory's government and then approved by Chinese officials in the JLG will remain in force after 1997. So far treaties with Australia, Canada and the Netherlands have been signed with Chinese approval. It is expected the extradition agreement with Manila will be the next to be written into law. According to the Security Branch spokesman negotiations are also continuing regarding extradition treaties with Malaysia, New Zealand, Singapore, Germany, India and the United States. ''Negotiations are going smoothly with a treaty with Malaysia expected to be the next to be signed after the Philippines.''