KEY POINTS
  • Oil prices hit their highest level since early December 2014 after President Donald Trump warned Russia to prepare for a strike on its ally, Syria.
  • The Russian ambassador to Lebanon earlier said his country would intercept any U.S. attack on Syria and potentially target the craft that fired missiles.
  • Crude futures tacked on gains following a strike on top oil exporter Saudi Arabia by rebels in neighboring Yemen.

Oil prices hit new 2018 highs as missile strikes on top crude exporter Saudi Arabia added to the market's worries about escalating conflict between the United States and Russia in Syria.

Brent, the benchmark for international oil prices, earlier climbed to its highest level in more than three years after President Donald Trump earlier warned Russia to "Get ready" for a U.S. missile attack on Syria, whose government Moscow has backed during its seven-year civil war.