<br/>Four persons including two BSF men were killed and eight injured last night when a private bus rammed into a van ferrying the paramilitary personnel in south Delhi. Police said, the accident took place in Sadiq Nagar around 11 pm. They said, the tourist bus hit divider while trying to save a motorcyclist, and then rammed into the BSF van.<br/><br/> Four persons were brought dead to the AIIMS trauma centre while the eight injured, most of them BSF personnel, are being treated. Hospital sources said, the condition of three injured, including the driver of the tourist bus, is serious.<br/>