Nokia shares tumble after weak sales

Nokia sold 7.8m Lumia phones in the second quarter

Nokia shares have tumbled 4.6% after the company released weak second quarter sales.

The mobile phone company reported sales of 5.69bn euros ($ 7.46bn, £4.92bn) for the three months to the end of June, down 24% on the same period last year.

The company sold 53.7m mobile phones during the quarter, down 27% on last year.

Sales of its new Lumia phones, which run a Microsoft operating system, rose to 7.4m in the second quarter.