Nifty slips below 24,750 mark; oil & gas shares slide for the 5th day

At 14:30 IST, the barometer index, the S&P BSE Sensex tumbled 812.65 points or 1% to 80,869.77. The Nifty 50 index slipped 278.20 points or 1.11% to 24,736.40.