AC Milan's Carlos Bacca is wanted by West Ham

West Ham have submitted a £15m bid for AC Milan striker Carlos Bacca, according to Sky sources.

However, it is understood the Colombian forward, who turns 30 in September, is valued at £19m by the Serie A club.

Bacca scored 18 league goals in his first season with the Rossoneri after joining in a £21.3m deal from Sevilla last summer.

Hammers bid for Alexandre Lacazette was turned down

West Ham co-chairman David Sullivan has been vocal in his desire to sign a "top striker" this summer and has indicated a willingness to spend up to £30m.

The Hammers have already had bids for Alexandre Lacazette and Callum Wilson turned down, while Sky sources understand the Hammers remain interested in Michy Batshuayi and Christian Benteke.

Havard Nordveit signed for the club earlier this month from Borussia Monchengladbach

Norway international Havard Nordtveit became West Ham's first signing of the close season earlier this month and Sullivan is anticipating a busy summer of transfer activity at the club, with a top class striker at the top of his wish list.

"We have done well with our signings and we hope we can sign a few more this summer who will do equally as well or better," Sullivan told the club's official website.

"We know that we need a top striker which is the hardest thing to sign. We need a 20-goal-a-season striker and that will cost us £25m or £30m. That is where the bulk of the money goes."