MANILA: Benchmark iron ore futures in China and Singapore climbed by more than 3percent on Monday as traders worried that a prolonged armed conflict between Russia and Ukraine could also curb global supply of the key steelmaking ingredient.

The most-traded May iron ore contract on China’s Dalian Commodity Exchange advanced by as much as 3.6percent to 711.50 yuan ($112.68) a tonne, after last week’s 1.8percent gain. On the Singapore Exchange, iron ore’s most-active April contract rose as much as 3.2 percent to $141.05 a tonne.

“Any prolonged military campaign will severely impact annual iron ore exports totalling almost 70 million tonnes from Russia and Ukraine, eventually tightening the global balance,” said Atilla Widnell, managing director at Navigate Commodities in Singapore.

While Russia and Ukraine are not major suppliers of iron ore to China, the world’s biggest steel producer, which buys most of its requirements from Australia and Brazil, exports of the material from the two nations now at war are usually sold to other European countries.

Russia’s invasion of Ukraine has triggered a Western political, strategic, economic and corporate response unprecedented in its extent and coordination, with the harsh sanctions including blocking some Russian banks from the SWIFT international payments system.

As this month’s Beijing Winter Olympics has ended, rebounding Chinese blast furnace capacity utilisation rates, which should result in the quicker drawdown of iron ore inventories at Chinese ports, are also expected to offer further price support, Widnell said.