Sensex fell 786.58 points to 76,624.90 and Nifty slipped 210.95 points to 23,959.80.
Infosys, TCS, Tech Mahindra and HCL Tech were among the biggest losers, while NTPC, Bharti Airtel, Trent and Power Grid gained.
The BSE IT index dropped 5.38% after Accenture cut its revenue growth guidance.
