Indian benchmark indices, Sensex and Nifty, erased day's gains to end sharply lower for fifth consecutive session on Thursday, weighed down by sell-off in IT, Teck and pharma stocks. Worries related to rising bond yields and spike in COVID-19 cases also injected negativity in the market. The S&P BSE Sensex ended 585.10 points or 1.17 per cent lower at 49,216 and NSE Nifty 50 index fell 163 points or 1.11 per cent to settle at 14,557. The broader markets also witnessed bloodbath, with midcap and small cap indices declining 1.1 per cent and 1.45 per cent, respectively. Among the individual stocks, HCL Technologies, Infosys, Dr. Reddy's Laboratories, Reliance Industries, Tata Consultancy Services were among top losers, while ITC, Bajaj Auto, Bharti Airtel, Mahindra & Mahindra and Maruti Suzuki India were among notable gainers.