Asia-Pacific leaders have endorsed tough new measures to fight international terrorism, including policies to make air travel safer and to cut the flow of funds to Islamic extremists. At the end of their annual summit, the 21 member nations of the Asia-Pacific Economic Co-operation forum (Apec) also called on North Korea to abandon nuclear weapons after it stunned the world by admitting to a secret programme in violation of a 1994 agreement. Pyongyang was warned it could miss out on the economic benefits of regional co-operation if it failed to comply. The warning reflected a rare unity among Asian nations within range of a potential North Korean nuclear attack. Members were also united in their support of US anti-terrorism proposals for air travel, which included more effective baggage checks, tighter immigration controls, and closer screening of passengers on international flights. Measures were also proposed to protect ports and merchant ships across trouble spots in Indonesia, the Philippines and Malaysia. Container security would also be strengthened to restrict the transportation of explosives and other illegal goods. The measures, called the Secure Trade in the Apec Region (Star) initiative, are to be introduced over the next three years. Playing down the costs involved, Chief Executive Tung Chee-hwa said the SAR government would take action to comply with the new measures. 'Though we will incur some costs, Hong Kong will do its best to comply with the timetable,' he said. Mr Tung declined to say whether such costs would be transferred to consumers or would hamper cargo movement in the SAR. The US said it wanted to improve the security of container shipping and was working with China, Hong Kong, Singapore, Canada and Japan on a tracking system to identify high-risk cargo. However, Japan has indicated that it is uncomfortable with some aspects of the plan dealing with maritime safety inspections. Apec nations account for about 60 per cent of global output and half of international trade and are home to 21 of the world's 30 largest container ports and 23 of the world's 30 busiest airports. The new anti-terrorism package was the core of the leaders' communique released on Sunday at the close of the summit. Pacific Rim leaders hoped the proposals would prevent terrorists from spreading violence through global transportation networks. The communique also contained landmark proposals to curb the financing of radical groups such as Osama bin Laden's al-Qaeda terror network. The decision to monitor money transfer systems, such as the ancient Middle Eastern honour-based hawala believed to have been used by bin Laden and the September 11 hijackers, and halt misuse of charities, was a first by a multilateral group. It also called for efforts to enact comprehensive laws against cyber crime and for closer co-operation on law enforcement.