The 26-year-old will spend the rest of the season at Metz, who also have an option to buy the player. The deal is the second between the clubs this month after Diafra Sakho joined West Ham in a permanent move.
Talks are ongoing but Everton could sign Eto'o in time for him to be in line for a debut against his old side at Goodison on Saturday.
Ethiopia Football Federation president Junedin Basha told BBC Sport: "We already have two ready venues, the Addis Ababa and the Bahir Dar stadiums, and the construction of the other venues has also reached to a good level.
GROUP A and GROUP B
This weekend's fixtures
GROUP A
• Real Bamako vs Coton Sport 1:1
• AC Leopards (CGO) vs ASEC Mimosas 4:1
GROUP B
• Sewe San Pedro vs Nkana 3:0
• Al Ahly vs Etoile Sahel 0:0
Eto'o dropped from Cameroon squad for Nations Cup qualifiers - Cameroon have made a major overhaul to their squad, dropping 13 players from the party who went to the World Cup including captain Samuel Eto'o.
Mazemebe & Sfaxien out to avoid clash in semi-finals
This weekend's fixtures
GROUP A
• Al Hilal vs Zamalek -:-
• AS Vita Club vs TP Mazembe -:-
GROUP B
• CS Sfaxien vs Entente Setif -:-
• Esperance vs Al Ahli -:-
Masahaba said: "It is very interesting to select the national team players, but there is also the difficult side of it, especially at this level where there are several very good players in different positions.
Ghana drop Kwarasey and Essien for Nations Cup qualifiers - Ghana coach Kwesi Appiah has named a 24-man squad for next month's 2015 Africa Cup of Nations qualifiers.
This weekend's fixtures
GROUP A
• Real Bamako vs Coton Sport -:-
• AC Leopards (CGO) vs ASEC Mimosas -:-
GROUP B
• Sewe San Pedro vs Nkana -:-
• Al Ahly vs Etoile Sahel -:-
Round of 32
Match 84
Day 22
Spain vs Austria 3:0
Goals Spain
Mikel Oyarzabal (36', 89')
Pedro Porro (66')
Assists Spain
Marc Cucurella (36', 89')
Álex Baena (66')
Austria
Spain