The 30-share benchmark index, which had lost 142.88 points on Friday, lost 183.14 points, or 0.94 per cent, to 19,244.42 in the early trade.
Similarly, the wide-based the National Stock Exchange Nifty declined by 58.25 points, or 0.99 per cent, to 5,814.35.
All the sectoral indices, led by metals, realty and bank, were trading in the negative zone, with losses of up to 2.07 per cent.
Brokers said continued selling by funds largely in line with a weak trend in Asian bourses as euro-zone fears returned on news that Cyprus was planning to tax bank depositors as part of a controversial bailout, influenced the trading sentiment here.