Tiwari said the improvement in the condition of grasslands, spread over 450 hectares, have been attracting the big cats for the last few years to the reserve, nearly 200 km from Patna. Besides, intensive patrolling by local youth played a major role to check entry of poachers and others in the reserve. "Tigers are more safe than before," he said. Tiwari said that a tigress gave birth to three cubs in the reserve a few months ago -- the second such development in the area in one-and-half years.