They were all part of the side that won the Champions League in 2019 and Premier League in 2019-20.

A statement from Liverpool said: "All four players will depart with our gratitude and appreciation for the contribution they have made."

The club added that special tributes would be paid to the players in the Reds' final Premier League home game of the season against Aston Villa on Saturday.

Liverpool boss Jurgen Klopp had already outlined the club's intentions to be active in the summer transfer window.

Milner and Firmino joined the club in 2015 under Brendan Rodgers and went on to win a historic Premier League title in 2019 - the club's first top-flight triumph in 30 years - as well as the FA Cup last season.

Former Manchester City midfielder Milner, who has made 330 appearances for the club, has been linked with moves to Brighton and Leeds.

Firmino became the highest-scoring Brazilian striker in Premier League history in 2019 and now has 80 goals in 254 top flight appearances.

The 31-year-old will be best remembered at Liverpool for his time playing alongside Mohamed Salah and Sadio Mane as part of a prolific front three under Klopp.

Keita, who scored 11 goals in 129 appearances, signed in 2017 but has made just 12 appearances this season having struggled with injuries.

Meanwhile Oxlade-Chamberlain has also struggled for minutes this season, making just 13 appearances, the last of which was against Real Madrid in Liverpool's Champions League last-16 exit.

The 29-year-old joined in 2017 and has made 146 appearances for the club, scoring 18 goals.