West Ham sign midfielder Fernandes from Sion

West Ham United's new signing Edimilson Fernandes is introduced to the fans before the start of the match Action Images via Reuters / John Sibley Livepic

LONDON (Reuters) - Swiss midfielder Edimilson Fernandes has joined West Ham United from Sion, the London club said on their Twitter account on Thursday.

No fee was disclosed but media reports put it at five million pounds ($6.59 million).

A Swiss Under-21 international, Fernandes is a product of Sion's youth academy. He made 26 top-flight starts for the club last season.

(Writing by Mark Greaves; Editing by Tony Jimenez)