New Delhi:Oil minister Dharmendra Pradhan expressed concerns about rising crude oil prices to his Saudi Arabian counterpart, Khalid al-Falih, on Friday amid worsening US-Iranian tensions, a government statement said.Global oil prices rose sharply on fears of a USmilitary attack on Iran that would disrupt flows from the Middle East, which provides more than a fifth of the world's oil output.Mr Pradhan told Khalid al-Falih by telephone that he wanted Saudi Arabia to play an active role within OPEC and OPEC+ to keep oil prices at a reasonable level.