Dow futures drop more than 800 points after Russia attacks Ukraine

U.S. stock futures fell sharply early Thursday as Russia attacked Ukraine, sending indexes off 2% as the aggression sparked more unease on Wall Street.

Dow futures fell 810 points, or 2.4%, while futures tied to the S&P 500 were down 2.5% as well and pointing further into correction territory. Nasdaq 100 futures declined 3%, hovering around bear-market levels for the tech-focused index.

Oil prices popped as fighting commenced, with West Texas Intermediate futures trading 7.2% higher at just shy of $100 per barrel. Global benchmark Brent jumped 7.7% to $104.56 per barrel, passing the $100 level for the first time since 2014. Treasury yields tumbled, with the benchmark 10-year note declining to 1.86% as investors sought safe-haven bonds.

Bank stocks were among the big early losers, with Bank of America down 4% and Bank of New York Mellon slumping 6.3% in premarket trading. Economically sensitive companies also took a hit, with Deere and Delta Air off 5% and cruise line operator Carnival sliding 6.2%.

Energy companies surged amid the rising prices.