Traders have resumed offers of Russian crude cargoes to Indian refiners at narrower discounts after a delay triggered by recently imposed U.S. sanctions that have pushed up trading costs, Indian refining sources said on Friday.

Russia is sending cargoes of sanctioned oil to India on tankers that have been blacklisted by the US Treasury — setting up an acid test of Moscow's ability to get around aggressive measures imposed by Washington earlier this month.

Trade for March-loading Russian oil in top buyer Asia has stalled as a wide price gap between buyers and sellers emerged in China after costs for chartering tankers unaffected by U.S. sanctions jumped,

Russia has continued to send cargoes of crude oil to India on tankers that have been sanctioned by the US, Bloomberg reported on Tuesday. This situation presents a crucial test of Moscow’s ability to circumvent the stringent sanctions implemented by Washington earlier this month.

Millions of barrels of oil that would normally be preserve of oil refineries in Europe are instead heading to Asia as US sanctions on Russia revive one of the market’s great arbitrage trades.

Trade for March-loading Russian oil in China and India has stalled due to soaring shipping costs triggered by U.S. sanctions introduced on Jan. 10, Reuters reported on Jan. 28. The sanctions target nearly 200 vessels in Russia's "shadow fleet,