Equity benchmark indices Sensex and Nifty tumbled in early trade on Monday amid heightened tensions in the Middle East after the US bombed three major nuclear sites in Iran.

The 30-share BSE Sensex tumbled 705.65 points to 81,702.52 in early trade. The 50-share NSE Nifty dropped 182.85 points to 24,929.55.

The US bombed three major nuclear sites, Fordow, Natanz and Isfahan, in Iran, bringing itself into the Israel-Iran conflict.