European shares weakened again on Friday, as investors continued to sell down the banking and financial services sector as worries about the extent of exposure to U.S. home loans continued to weigh.

Shares in Barclays declined 1.7%, Royal Bank of Scotland lost 1.3% and Dexia shares slipped another 3%. Investors are also waiting for some key U.S. jobs data out later. Shares in British Airways lost 3.7% after the firm said that its first-half revenue was hurt by currency movements and trimmed its fiscal-year revenue guidance.

Broadly, the U.K. FTSE 100 index slid 0.9% at 6,528.50, the German DAX 30 index lost 0.7% at 7,821.79 and the French CAC-40 index slipped 0.8% at 5,687.71.