Around 2:25 p.m. GMT (3:25 p.m. in Paris), a barrel of Brent from the North Sea for delivery in May took 6.41% to 114.85 dollars.

A barrel of West Texas Intermediate (WTI) for April delivery gained 6.05% to 111.03 dollars.

The two black gold benchmarks are thus back above the bar of 110 dollars per barrel (+47% since the start of the year).

Saudi Arabia, the world's largest crude oil exporter, warned on Monday of the risk of a drop in its oil supplies, due to attacks by rebels in neighboring Yemen on its oil facilities.

The country announced on Sunday a "temporary reduction" in its oil production at one of the giant Aramco's facilities, hit by an attack by Houthi rebels in Yemen.

The Houthis have launched several nightly drone and missile attacks on targets in Saudi Arabia, with the country leading a military coalition in Yemen that has backed power against the Iran-backed Houthis since 2015.

"Saudi Arabia will not take responsibility for any shortage of oil supply in world markets in light of attacks on its oil facilities," the foreign ministry said.

"The attack is another unfortunate reminder of the uncertainty currently affecting global oil markets," said CMC Markets analyst Michael Hewson.

It comes amid strong fears of disruptions to global crude supplies, compounded by war in Ukraine, with Russia among the world's largest crude oil exporters.

The war in Ukraine and tensions in the Middle East "exacerbate an existing imbalance between supply and demand in the market", underlines Victoria Scholar, analyst at Interactive investor.

Ukrainian President Volodymyr Zelensky on Monday called on the European Union to cease all "trade" with Russia, and in particular to refuse its energy resources, in a video on Telegram messaging.

The Kremlin meanwhile warned earlier Monday that a potential European embargo on Russian oil would hit "everyone", as the European Union is set to study at a meeting the possibility of new sanctions against Moscow.

“The possibility of additional sanctions against Russia, already applied by Western buyers” constitutes “a colossal risk” and could further boost prices, confirms Stephen Innes of SPI Asset Management.

Last week, the International Energy Agency (IEA) said it feared a "shock" on world oil supply, following sanctions against Russia taken after its invasion of Ukraine.

© 2022 AFP