Newcastle United have announced that Emmanuel Riviere has been allowed to leave the club in order to sign for Metz.
In 2014, Newcastle spent £5m to buy the Frenchman from AS Monaco, but the attacker failed to establish himself at St James' Park.
In three years contracted to the North-East outfit, the 27-year-old netted a total of three goals in 31 appearances in all competitions.
Riviere spent the most recent campaign on loan at Osasuna, but made just eight starts and seven substitute outings in La Liga.
Metz have lost each of their first three fixtures in Ligue 1, while also netting just the one goal.