Stocks fell and the price of oil spiked on Tuesday after a series of posts from President Donald Trump had Wall Street worried again about an escalation in the conflict between Israel and Iran.

The Dow Jones Industrial Average fell 299 points, or 0.7%. The S&P 500 dropped 0.8%. The Nasdaq Composite fell 0.9%.

WTI crude oil futures jumped 4.3% to $74.84 a barrel, its highest settlement value since Jan. 22, according to Dow Jones Market Data.