The 18-year-old joined Italian side Lazio from Barcelona in the summer of 2011.
Sky Sports Italia reports that Liverpool had the former Barcelona youngster watched in Lazio’s 1-0 win over Legia Warsaw in the Europa League last Thursday.
The Liverpool scouts have been impressed by Keita and the club could make a move for the 18-year-old in the January transfer window.
Keita’s current contract with Lazio is set to expire in the summer of 2017.