The share market plunged more than three per cent in early morning trade on Thursday, as investors fled risk assets after Russian President Vladimir Putin declared war against Ukraine.The blue-chip NSE Nifty 50 index was down 3.24 per cent or 552.95 points at 16,510.30 and the S&P BSE Sensex was 3.28 per cent or 1,874.56 points lower at 55,357.50. Both indexes opened more than 3 per cent lower and were headed for their longest losing run since March 2020, down for a seventh straight session.