Manchester United have stepped up their interest in AIK striker Alexander Isak.

Expressen says the 17-year-old striker has hit nine goals in 20 league appearances for AIK Solna this season.

His impressive breakthrough has captured the attention of numerous clubs with Leicester and Liverpool keeping tabs.

United are among the clubs scouting Isak.

AIK chief Bjorn Wesstrom previously declared he hopes to rake in a club-record fee for Isak.