West Ham also made an offer worth around €30 million to sign Maxi Gomez but are now ready to turn their attention to Lucas after Celta Vigo asked €40m for the Uruguay global.
West Ham have continued their £100million summer spree by signing Lucas Perez - and will swoop for "The Rock" next.
'I'm very excited, as West Ham are giving me the chance to stay in the Premier League and I'm very happy to be part of this new project.
Perez has found first-team opportunities limited following his move to the Emirates from Deportivo in August 2016 for a fee understood to be £17.1m - scoring once in 11 Premier League matches.
IDF Responds After Dozens of Gaza Terror Rockets Fired at Israel
At the same time Israeli aircraft struck 140 targets belonging to the Hamas Islamist group that controls the Gaza Strip. The Israeli army earlier on Wednesday said Palestinians fired at least 36 rockets across the border.
Perez is set to add some extra firepower to the frontline once his deal is confirmed by the club and he will hope to put some pressure on West Ham talisman Marko Arnautovic for his spot.
But the Spaniard is now on the verge of leaving, with Arsenal taking a huge hit on their £17m outlay.
The Hammers have splashed the cash to bring in the likes of Felipe Anderson, Andriy Yarmolenko, Lukasz Fabianski and Issa Diop this summer but want to bolster their squad before the window slams shut at 5pm.
Perez flourished at La Coruna where he scored 33 goals in 96 appearances after some short stints at Rayo Vallecano, Karpaty Lviv and PAOK.