US energy stocks fall as easing US-Iran tensions weigh on oil

** Shares of US energy companies fall premarket, tracking rising oil prices O/R

** Brent crude futures down 1.3% at $115.1 a barrel and U.S. West Texas Intermediate crude down 2.1% at $101.2 per barrel

** Oil prices fall after surging last week but still hold near six-month highs amid hopes of easing hostilities between the United States and Iran, although persistent attacks on key producer Saudi Arabia kept investors wary

** Top oil and gas cos Exxon XOM.N and Chevron CVX.N fall 1.2% and ~1%, respectively

** Occidental Petroleum OXY.N and ConocoPhillips COP.N dip 1.4% and 1.3%, respectively

** Refiners Marathon Petroleum MPC.N and Valero Energy VLO.N fall 2.9% and ~1%, respectively