Five security personnel were killed and several others were injured on Saturday in an encounter with Maoists in a forest along the border between Bijapur and Sukma districts in Chhattisgarh, police officials said, adding at least 15 jawans are missing and efforts are on to trace them, ANI reported. "At least 15 jawans missing after yesterday's Sukma encounter. A reinforcement party rushed to the spot. Bodies of 2 out of 5 jawans who died in encounter recovered," Chhattisgarh Police Sources was quoted by ANI as saying.