Benchmark domestic indices Sensex and Nifty tumbled in early trade today amid surging oil prices and weak global market trends after a fresh escalation in tensions in West Asia. The 30-share BSE Sensex tanked 833 points to 74,405 in early trade. The 50-share NSE Nifty dropped 234 points to 23,402. Brent crude, the global oil benchmark, traded 1.79 per cent higher at USD 111.2 per barrel. In Asian markets, Japan’s benchmark Nikkei 225 index, Shanghai’s SSE Composite index and Hong Kong’s Hang Seng index quoted lower, while South Korea’s benchmark Kospi traded in positive territory. US markets had ended over 1 per cent lower on Friday.