European stocks dipped in early trade on Thursday, extending a week-long slide as tensions between the West and Russia continued to spook investors, Reuters reported. At 0800 GMT, the FTSEurofirst 300 index of top European shares was down 0.2 percent at 1,321.40 points. The index has dropped about 3.3 percent over the past week. Germany's DAX index underperformed again, down 0.4 percent. Data showed on Thursday the country's industrial output rose just 0.3 percent in June, missing a forecast rise of 1.3 percent, adding to signals that Europe's largest economy may have stalled in the second quarter. Around Europe, UK's FTSE 100 index was down 0.2 percent and France's CAC 40 down 0.1 percent, while Portugal's PSI 20 index dropped 2 percent. Shares in Portugal's largest listed bank Millennium bcp slumped over 10 percent and other banks also fell sharply on investor concerns that lenders will end up paying for the recent rescue of rival Banco Espirito Santo by the state.