Ukrainian President Volodymyr Zelenskyy says rising global oil prices following Israeli strikes on Iran will strengthen Russia by increasing its oil revenues, aiding its war effort in Ukraine.

Oil prices leaped, and stocks slumped on worries that escalating violence following Israel’s attack on Iranian nuclear and military targets could damage the flow of crude around the world, along with the global economy.

Diamondback Energy stock rose 5% and Occidental Petroleum rose nearly 5% as a swathe of energy-related stocks reacted to a jump in crude prices after Israel's attack on Iran. Conoco-Phillips' stock rose 4%, ExxonMobil rose 3% and Chevron gained 2.7%.