Swansea forward Andre Ayew is attracting interest from West Ham

West Ham have enquired into the availability of Swansea forward Andre Ayew, according to Sky sources.

The Hammers are yet to lodge an official bid for the 26-year-old, who is understood to be valued by Swansea at £20m.

Ayew attracted interest from West Ham last summer, but joined the Swans on a free transfer and went on to score 12 goals during his debut season in the Premier League.

Ayew (C) scored in Swansea's 4-1 victory over West Ham in May

The Ghana international, who is contracted to Swansea until 2019, is currently one of only two senior forwards at the club following the departure of Bafetimbi Gomis to Marseille on a season-long loan.

Swansea hope to sign two strikers before the close of the summer transfer window and it is understood they will not entertain the possibility of selling Ayew until they have acquired attacking reinforcements.

Meanwhile, Sky sources also understand West Ham are closing in on the loan signing of Argentine forward Jonathan Calleri from Boca Juniors.

West Ham are closing in on the loan signing of Jonathan Calleri

A deal for the 22-year-old is nearing completion, but an announcement is not imminent.

Calleri spent last season on loan at Brazilian club Sao Paolo and scored 16 goals in 31 appearances.