Global shares mostly declined on Tuesday as recent enthusiasm cooled and markets faced uncertainty about efforts to end the war in Iran.

France's CAC 40 dipped 1.0% in early trading to 8,313.86, while the German DAX fell 1.6% to 24,746.63. Britain's FTSE 100 declined 0.6% to 10,379.26. U.S. shares were set to drift lower with Dow futures down 0.7% at 51,774.00. S&P 500 futures fell 1.5% to 7,429.25.