The key domestic benchmark indices extended losses during the late noon trading session on profit booking amid mixed global cues.
At 14:18 hours, the 30-share benchmark index was trading at 26664.04 down by 148.74 points or by 0.55 per cent, while the NSE Nifty was at 8184.6 down by 35.3 points or by 0.43 per cent.
Further, the investors turned cautious ahead of the referendum on Thursday in which Britain will decide to stay or leave the European Union.
In the choppy trade so-far, Sensex touched intraday high of 26887.29 and intraday low of 26617.45 The NSE Nifty touched intraday high of 8238.35 and intraday low of 8153.25.
Profit booking was primarily witnessed in stocks including Tata Motors Ltd. (Rs. 468.80,-3.34%), GAIL (India) Ltd. (Rs. 375.30,-1.78%), Hindustan Unilever Ltd. (Rs. 859.00,-1.50%), Tata Steel Ltd. (Rs. 329.65,-1.26%), Infosys Ltd. (Rs. 1193.35,-1.04%), among others.
However, some buying interest was seen in index heavyweights including Dr. Reddy's Laboratories Ltd. (Rs. 3095.90,+1.52%), Coal India Ltd. (Rs. 315.00,+0.72%), Lupin Ltd. (Rs. 1459.00,+0.66%), Adani Ports & Special Economic Zone Ltd. (Rs. 204.50,+0.64%), Bharti Airtel Ltd. (Rs. 363.85,+0.46%), among others.
Among the sectors, auto and FMCG were among the major losers, declining 1.04 per cent and 0.59 per cent respectively.
The Market breadth, indicating the overall strength of the market, was weak. On BSE out of total shares traded 2736 , shares advanced were 911 while 1627 shares declined and 198 were unchanged.
On the global front, Asian peers ended the day on a mixed note, while European stocks were trading marginally in green as investors remained cautious a day ahead of the UK's referendum on European Union (EU) membership.