By Harvey Byrne

Argentine striker Jonathan Calleri has agreed a move to West Ham, but the forward is awaiting a work permit decision, according to a well-placed club insider.

Jack Sullivan, the son of Hammers co-owner David Sullivan claimed on his personal Twitter account on Wednesday night that the 22-year-old has agreed a move to the east London club, with the move now subject to a work permit application next week.

It was last claimed that West Ham were set to beat their London rivals Tottenham to the signature of Calleri and now the move looks increasingly likely to happen for the Europa League side.

Sullivan junior has become renowned for providing insider information on transfer deals on Twitter shortly before they are announced by the official West Ham media outlets.

Calleri has been likened to West Ham fans favourite Carlos Tevez after an impressive spell of form in his home country, and is becoming increasingly known for skill and technical ability.

Bilic has been in the hunt for a proven goalscorer all summer, and has been linked with the likes of Christian Benteke, Michy Batshuayi, Alexandre Lacazette, Theo Walcott as well as a sensational east London return for Tevez.

However, the Hammers have ahad a mega-bid accepted for AC Milan striker Carlos Bacca and the club are waiting on a decision for the striker in 48 hours.

West Ham signed 20-year-old Ashley Fletcher from Manchester United earlier this summer, but he is not the senior front man that Bilic is targeting to immediately strengthen the first team.

Calleri, who is yet to make any Argentina appearances, has attracted Premier League interest since scoring 21 goals in 53 matches for former club Boca Juniors.

He has since been loaned to Sao Paulo for six months via Uruguayan club Deportivo Maldonado and 10 matches for the Brazilian side in 2016 have yielded an impressive eight goals.

However, any deal for the youngster will be complicated as any buyer wanting to negotiate a permanent deal would have to buy his third party investment.

In other West Ham transfer news, Crystal Palace have joined the race to sign £15million-rated striker Diafra Sakho.