People gather together for myriad reasons and in an overcrowded region, human detection is a very challenging problem. Automated multiple human detection is one of the most active research fields of computer vision applications. It provides useful information for crowd monitoring and traffic controlling for human safety in public places. The conventional Gaussian mixture model, that has a fixed K values, is not enough for dynamically varying background and further foreground detection is a time consuming process. The automated multiple human detection algorithms are needed to deal with complex background and illumination change conditions of crowd scene. In this paper, an automated multiple human detection method using hybrid adaptive Gaussian mixture model is proposed to handle efficiently the complex background and illumination changes. The proposed hybrid algorithm utilizes spatiotemporal features, adaptive learning control, adaptively changing weights and an adaptive selection with number of K Gaussian components per pixel to withstand in complex background and different lighting conditions. The experimental results and performance measures demonstrate that the proposed hybrid method performs well for crowd scene. By using the proposed adaptive hybrid method, the multiple human detection rate has been improved from 90 % to 95 % and the computational time is reduced from 5secs to 2.5secs.