Doha [Qatar], April 14: Oil prices surged by more than 7% back above $100 a barrel on Monday after US President Donald Trump ordered the blockading of Iranian ports following the failure of peace talks between Washington and Tehran.
Brent crude, the global benchmark for oil prices, jumped to $102.02 a barrel (£75.91), while West Texas Intermediate rose by 7.5% to $103.78.
The cost of a barrel of oil had plunged well below $100 last Wednesday after the US and Iran struck a conditional two-week ceasefire deal that included opening the Strait of Hormuz, a key shipping route for global oil and gas supplies.
However the failure of negotiations has raised concerns that the global energy crisis will deepen.
The strait, through which a fifth of the world's energy shipments pass, has become a flashpoint of the conflict after Iran retaliated against US-Israeli strikes by threatening to attack vessels that try to use thewaterway.
Shipments have largely been at a standstill since the US-Israel war with Iran started on 28 February, leading to energy prices surging around the world and pushing up costs for consumers, in particular making petrol and diesel more expensive.
However, Iran has continued to export oil.
Windward, the maritime intelligence firm, said that since 1 March more than 58 million barrels of oil have left Kharg Island, Iran's main outlet for crude exports. It said more than 90% of these have been directed toward China.
On Sunday, Trump announced that "effective immediately", the US Navy "will begin the process of BLOCKADING any and all Ships trying to enter, or leave, the Strait of Hormuz".
US Central Command later said it would block all vessels entering and exiting Iranian ports and coastal areas in the Strait from 10:00 EST (15:00 BST) on Monday.
It said the blockade would not apply to ships transiting the Strait of Hormuz to and from non-Iranian ports.
On Monday, the Unified Command of Iranian Armed Forces said that US restrictions on vessels in international waters were "illegal and constitutes piracy".
It added that Iran would implement a "permanent mechanism to control the Strait of Hormuz following US threats".
China has called for restraint.
"The Strait of Hormuz is an important international trade route for goods and energy, and maintaining its security, stability and unimpeded flow is in the common interest of the international community," a spokesperson for China's foreignministry said.
Neil Shearing, group chief economist at Capital Economics, said Trump's blockade may be "designed to pressure Beijing into playing a more active role in mediating a ceasefire and reopening full trade flows through the Strait".
Source: Qatar Tribune