brussels european union warn wednesday ready act within days counter propose new u.s. sanction russia say would harm bloc energy security sanction legislation overwhelmingly approve u.s. house representatives tuesday anger eu officials see break transatlantic unity west response moscow annexation crimea ukraine 2014 support separatists eastern ukraine brussels also fear new sanction harm european firm connections russia oil gas project eu dependent u.s. bill could unintended unilateral effect impact eu energy security interest eu chief executive jean-claude juncker say statement issue meet european commissioners unite view accord senior eu official concern take account sufficiently stand ready act appropriately within matter days america first mean europe interest come last say mention president donald trump guide slogan eu document prepare commissioners see reuters lay eu plan seek demonstrable reassurances white house would use bill target eu interest bloc say also prepare use eu regulation allow defend company application extraterritorial measure unite state diplomacy fail brussels plan file complaint world trade organization addition preparation substantive response would deter u.s. take measure eu company could consider say however measure take brussels would require approval 28 eu member governments could expose potential differences individual nations relations moscow washington despite change u.s. bill take account eu concern brussels say legislation could still hind upkeep gas pipeline network russia feed ukraine supply quarter eu need eu say could also hamper project crucial energy diversification goals baltic liquefy natural gas lng project new sanction target dispute nord stream project new pipeline run russia germany baltic sea eu note say impact would reality much wide list prepare eu executive see reuters show eight project include involve oil major anglo-dutch shell bp italy eni risk fall foul u.s. measure voice frustration fray joint western approach moscow juncker say close coordination among ally key ensure curb business russian energy defense financial sectors impose july 2014 effective eu source say juncker tell commissioners risk eu interest collateral damage u.s. domestic fight trump u.s. lawmakers unclear quickly u.s. bill would reach white house trump sign law veto bill amount rebuke trump require obtain lawmakers permission ease sanction moscow reject legislation would potentially stymie wish improve relations moscow would carry risk veto could override lawmakers european energy industry source voice alarm potentially wide-ranging damage new u.s. measure pretty tough one industry source tell reuters work eu officials see safeguard anticipate protect investment give us certainty five western firm partner russia gazprom nord stream german wintershall wint.ul uniper anglo-dutch royal dutch shell austria omv france engie eu officials warn u.s. measure would also hit plan lng plant gulf finland shell partner gazprom eu document show might jeopardize eni 50 percent stake blue stream pipeline russia turkey well cpc pipeline carry kazakh oil black sea involve european group bg overseas hold shell eni warn bp would force halt activities russian energy major rosneft eu warn u.s. may respond swiftly counter new sanction russia