At 12.30 pm on Thursday, the core equity indices i.e., Sensex and Nifty 50 were seen extending the losses since their opening, as Russia finally strikes Ukraine and has reportedly destroyed Ukraine airbases. The Sensex was trading at 55,486.52 down by 1740.51 points or 3.04 per cent, while Nifty was at 16,533.60, down by 540.75 points or 3.17 per cent from the last trading session.