Sensex fell 607.08 points to 76,802.90 and Nifty declined 154.90 points to 24,013.10.
Infosys, TCS, HCL Tech and Tech Mahindra were among the biggest laggards, pulling down the BSE IT index.
Investors also turned cautious after US–Iran talks were postponed and Brent crude slipped to $79.39 per barrel.
