Oil prices edged up on Monday on fears that new U.S. sanctions against Iran could be extended to affect crude supplies, but markets were capped by further signs of growing U.S. production. Tensions between Tehran and Washington have risen since a recent Iranian ballistic missile test which prompted U.S. President Donald Trump’s administration to impose sanctions on individuals and entities linked to Iran’s elite Revolutionary Guards military unit. Brent crude futures, the international benchmark for oil prices, were trading at $56.91 per barrel at 0320 GMT, up 10 cents from their last close. U.S. West Texas Intermediate (WTI) futures were up 8 cents at $53.91 a barrel. Traders said the strain between Tehran and the United States raised concerns that U.S. sanctions could be tightened further to impact Iranian […]