The Indian equity benchmarks extended losses in afternoon trading on Friday dragged by losses in index heavyweights like HDFC Bank, Infosys, ICIC Bank, Titan and Maruti Suzuki amid subdued global cues. Most of the Asian markets ended lower with Japan's Nikkei down 0.13 per cent, Hong Kong's Hang Seng down 0.44 per cent and Taiwan Weighted down 0.2 per cent. The Sensex fell as much as 184 points and Nifty 50 index touched an intraday low of 17,171.