West Ham agreed to personal terms with Saeed bin Rahma regarding his proposed £ 30m transfer from Brentford.
The 25-year-old was in West Ham for a medical examination on Thursday and agreed to a five-year deal.
West Ham increasingly hopes Ben Rahma can complete his move before the local transfers deadline on Friday.
On Wednesday, Bin Rahma met with Brentford officials to try to resolve a dispute over a payment he believes he owes.
Ben Rahma scored 17 goals in 46 games for Brentford last season when he reached the tournament play-off final before Thomas Frank’s side lost to Fulham in overtime at Wembley.
Meanwhile, West Ham remains interested in Bournemouth striker Joshua King despite his £ 13m offer at the weekend, with the Norwegian international championship club estimated at around £ 18m.
King, who has one year left on his contract, has scored 48 Premier League goals for the club since joining in 2015.
The deadline is the second day
The domestic transfer window between the Premier League and Premier League clubs remains open until October 16 – it’s called the Day Two Deadline – but how does it work?
The international deadline – where English clubs can buy, sell and loan players from abroad – closed on October 5, but the agreement between the Premier League teams and the Premier League League means players can still be transferred in England.
After consultation between leagues – and because FIFA allows for a summer transfer period of up to 12 weeks – Premier League clubs can still engage with Premier League teams for another 11 days in an effort to strengthen their squads.
They can take out loans or permanent engagements, as well as sell, but there can be no transfers between Premier League teams.
All EFL clubs can still do local business with any English team until the deadline for Day Two is Friday.
The local transfer window will run until 5 PM on Friday October 16.