Yahoo's profits rose by more than 50% in the second quarter, but net revenues fell short of analysts' estimates and its share price fell by more than 4%.

Yahoo said its revenue in the three months ending 30 June was $1.6bn (£1.05bn), compared with $1.57bn in the same quarter last year.

But Yahoo's net revenue, which excludes the revenue it shares with website partners, was $1.13bn.

This was below the average analysts' expectations of about $1.16bn.