Reflecting steep fall in blue-chips, the 30-share index which dipped below the crucial 28,000-mark in early trade, continued to slide and tumbled by 504.63 points or 1.79 percent to 27,667.06 during mid-session, with all the sectoral indices led by metal and auto, falling up to 4.14 percent.

The NSE Nifty also succumbed to all-round selling and cracked the 8,400-mark by falling 162.65 points or 1.91 percent to 8,348.15. Besides, fresh weakness in the rupee which depreciated by 17 paise to Rs 63.63 (intra-session) against the dollar too dampened trading sentiments, brokers said.

Sentiment was badly hit following a rout in other Asian markets with a near 7 percent crash in Shanghai despite additional measures announced by the government to shore up to the tumbling market, they added.

Japan's Nikkei tumbled 3.14 percent, Hong Kong's Hang Seng plunged 5.97 percent and Shanghai Composite index was down almost 6 percent after falling over 8 percent in early trade.

Major losers that dragged down the key indices were Vedanta (8.83 percent), Hindalco (6.20 percent), Tata Steel (3.90 percent), BHEL (3.32 percent), HDFC (2.46 percent), GAIL (2.20 percent), Infosys (2.11 percent), Coal India (2.05 percent), SBI (1.98 percent), M&M (1.90 percent), ITC (1.85 percent), Cipla (1.69 percent), Bharti Airtel (1.68 percent) and ICICI Bank (1.62 percent).

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