Mumbai, April 9 -- The key domestic indices witnessed selling pressure in afternoon trade, weighed down by uncertainty surrounding the US-Iran ceasefire. Investors are awaiting TCS' quarterly numbers for cues on the IT sector. Volatility remained elevated due to the weekly expiry of Sensex derivatives contracts, adding to the cautious undertone in the market. Nifty traded slipped below 23,800 level.

Metal, pharma and IT shares advanced while banking and consumer durables shares declined.

At 13:25 ST, the barometer index, the S&P BSE Sensex declined 871.12 points or 1.12% to 76,689.79. The Nifty 50 index tumbled 216.80 points or 0.90% to 23,780.00.

In the broader market, the BSE 150 MidCap Index dropped 0.58% and the BSE 250 SmallCap In...