The Daily Mail says the Gunners have offered Nketiah a five-year contract worth about ÂŁ100,000-per-week
The police will not take any chances of trouble between fans before England play Germany, while the FA will serve a one-game stadium ban when its side is scheduled against Italy
The 21-year-old has scored 19 goals to help Nottingham Forest reach the Sky Bet Championship play-off final.