Ghana striker Ayew leaves Swansea for West Ham

Britain Soccer Football - Swansea City v Manchester City - Barclays Premier League - Liberty Stadium - 15/5/16. Andre Ayew celebrates after scoring the first goal for Swansea. Reuters / Rebecca Naden

(Reuters) - Ghana striker Andre Ayew has joined West Ham United on a four-year deal from Premier League rivals Swansea City, the London club's co-owner David Gold said on Monday.

"Andre Morgan Ayew...joins West Ham on a four-year deal," Gold said on his official Twitter account.