Sky Sports News understands that Inter Milan striker Victor Obinna is having a medical at West Ham.
It was reported earlier this week that the Hammers were in talks with Obinna over personal terms.
And an agreement has now been reached with the 23-year-old undergoing a medical on Wednesday at Upton Park.
Hammers boss Avram Grant is desperate to bolster his attacking options after seeing his side score just once in their first two Premier League games and then scrape past Oxford in the Carling Cup.
Grant turned to Obinna after being forced to put his efforts to sign Manchester City's Felipe Caicedo on hold and Inter were willing to loan out the Nigeria international.
The former Chievo frontman went close to a move to Everton two years ago only for work permit problems to scupper the deal.
He has scored 11 goals in 34 internationals for Nigeria and played two games at this summer's World Cup before scoring once in Inter's 3-0 friendly win over Manchester City in the USA in pre-season.