I'm not even sure it's a spy movie. It might have been Japanese. In the mid-1960s my parents dropped me off at a matinee. I remember the story takes place at a hotel near a beach. Lots of green foliage and blue water come to mind. There was a scene I thought was very clever. The spy picks up the telephone and his hand starts bleeding. He looks at the receiver and its been studded with poisonous darts that pricked his skin. Then he drops dead. That's all I remember. Does anyone know the name of this movie?