Mumbai, Oct. 27 -- Indian equity markets opened lower on Tuesday, with the Sensex falling over 300 points and the Nifty slipping below the 22,690 mark, as crude oil prices hovered near USD 115 per barrel and investors remained cautious ahead of the US Federal Reserve's monetary policy decision later this week.

Brent crude was trading at around USD 114.91 per barrel while crude oil was trading at around USD 100.85 per barrel at the time of reporting.

VK Vijayakumar, Chief Investment Strategist, Geojit Investments Limited noted, "Brent crude remaining above USD 114 and the US 10-year bond yield hovering around 4.97% continue to be near-term headwinds for the market."

Both the benchmark indices opened with a gap-down. Sensex opened at 73,...