European shares opened lower on Tuesday as escalating tensions between the United States and Iran weighed on investor sentiment, while corporate earnings from companies including BP and Ericsson remained in focus, according to Reuters.
The pan-European STOXX 600 index fell 0.4% to 638.17 points by 0810 GMT, with the travel and leisure sector emerging as the biggest loser, down 2%. Airline stocks came under pressure as higher oil prices raised concerns over fuel costs, with Air France and Lufthansa each declining about 2%.