Bundesliga side Cologne have signed forward Reigan Heskey from Manchester City for a deal worth up to £8m.
The 18-year-old, who is the son of ex-England striker Emile, made his senior debut for City in the Carabao Cup last season.
He also scored the winning goal in the final to help City win the FA Youth Cup with victory over rivals Manchester United.
Sources say the move will allow Heskey to develop by playing first-team football in one of the top five leagues in Europe.
The deal includes sell-on and buy-back clauses for City, as well as matching rights should another club make a bid for Heskey in the future.
Heskey becomes the second City player to join Cologne this summer after centre-back Jahmai Simpson-Pusey made a permanent move last month.