Mumbai, Sept. 28 -- The key equity benchmarks ended sharply lower on Monday as escalating Iran-US tensions pushed crude oil prices higher and raised concerns over prolonged supply disruptions. Rising US Treasury yields, a weaker rupee, continued foreign investor selling and weak Asian market cues added to the pressure. Brent crude moved close to $107 a barrel, while the US 10-year Treasury yield climbed above 5.2%. Continued FPI selling also dented sentiment. The Nifty settled below the 22,800 level. The sell-off was broad-based, with all sectoral indices ending lower, led by declines in banking, realty and metal stocks.

The S&P BSE Sensex tanked 1,124 points or 1.52% to 72,771.72. The Nifty 50 index dropped 360.25 points or 1.56% to 22,...