The Indian equity benchmarks fell for second straight session on Thursday as investor sentiment remained bearish amid ongoing tensions between Russia and Ukraine. The benchmarks were also under pressure owing to weekly expiry of index futures and option contracts, analysts said. The benchmarks opened higher but erased intraday gains after reports surfaced that Russian troops captured southern Ukrainian city of Kherson. The Sensex fell as much as 1,065 points from day's highest level and Nifty 50 index touched an intraday low of 16,442 after hitting high of 16,769.