Prices had soared in response to the killing of an Iranian general in an American air strike last week and Iran's retaliatory attack on U.S. forces in Iraq on Wednesday, before diving more than 4% when two countries quickly ratcheted back tensions, hitting a three-week low. Brent crude futures rose 55 cents, or 0.8%, to $65.99 a barrel after tumbling 4.1% on Wednesday. They are now a little down on prices before the killing of Iranian military commander Qassem Soleimani that sparked the crisis. U.S. oil CLc1 added 61 cents, or 1%, to $60.22 after falling nearly 5% in the previous session. President Donald Trump on Wednesday dialled back on days of threatening commentary and said Iran was "standing down" after the missile attacks that left no casualties, with Tehran say the strikes "concluded" its response to the Soleimani killing. prices also came under pressure on Wednesday after a surprise build in U.S. crude stockpiles .