Wireless Sensor Networks (WSNs) have the potential to become significant subsystems of engineering applications. Tracking mobile targets is an important WSN application in both military and civilian fields for applications like tracking objects or humans or guiding robots in hard to reach areas e.g. nuclear power plants etc. Often it may be necessary for sending additional resources to the vicinity of the mobile target. Tracking mobile targets involves detection and localization of the object of interest by processing the information provided by the sensing nodes along with their location.