Uncertainty over the outcome of Assembly elections and a weak rupee sent the Sensex plunging over 350 points during the afternoon session of the trade on Thursday.
All the sectors on the BSE and NSE traded in the red.
The NSE's Nifty50 traded 103.75 points or 0.96 per cent lower at 10,679.15.
Brent crude traded lower at $60.91 per barrel after US President Donald Trump said: "Hopefully OPEC will be keeping oil flows as is, not restricted. The world does not want to see, or need, higher oil prices!"
The rupee continued to depreciate and traded at Rs 71 to a US dollar from its close of Rs 70.46.
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