Oil prices rose on Tuesday on rising disruptions from the Iran-Israel conflict, although major oil and gas infrastructure and flows have so far been spared from any substantial impact. Brent crude futures climbed $1.

Chinese refineries have become hooked on cheap imports of sanctioned Iranian crude.

The dramatic escalation in tensions between Israel and Iran caused a spike in the price of crude and raised fears among oil traders about disruption to shipping in the Strait of Hormuz, one of the world’s most vital waterways.