Newcastle have proposed a loan with view to making the deal permanent in the summer.
Newcastle United have asked about bringing Ademola Lookman back to the Premier League
Lookman, 22, cost Leipzig around £18m last summer.
The former Everton man was desperate to leave Goodison Park after a lack of games but has seemed to struggle in the German top-flight also.
Steve Bruce is hoping he can lure Lookman by promising him first-team football.
The winger has failed to make an impression since joining RB Leipzig from Everton