Berlin (dpa) - Lufthansa shares fell sharply on Thursday after Germany‘s biggest airline cut its profit outlook because advance bookings to Europe have been hit by terrorist fears and political uncertainty.The airline‘s shares tumbled 8 per cent to 10.20 euros (11.23 dollars) on the Frankfurt Stock Market after it surprised financial markets late Wednesday by saying it expects adjusted earnings before interest and tax (EBIT) to fall this year. In March, it had forecast a slight rise compared with 2015.The carrier said it had revised its profit outlook downward because advance bookings, notably on flights to Europe, "have declined significantly, in particular due to repeated terrorist attacks in Europe and to greater political and economic uncertainty."Europe has been hit by a string of deadly terrorist attacks, including ones in Paris, Brussels, Nice and Istanbul, as well as a knife-and-axe attack this week on train passengers in the southern German state of Bavarian.However, Lufthansa said first-half adjusted EBIT climbed 13 per cent to 529 million euros from 468 million euros in the same period in 2014, despite sales edging lower to 15 billion euros from 15.4 billion a year earlier.