Phunya Sele announced Sankara’s capture on their official Twitter account.
“Robert Sankara puts pen to paper for @Bloem_Celtic on a 2 year deal,” read the club’s tweet.
Sankara made 20 league appearances for Stars last season, but the club decided against renewing his contract upon its expiry at the end of June.
The Burkina Faso centre back has now found a home at Celtic under the mentorship of Serame Letsoaka.
— Bloemfontein Celtic (@Bloem_Celtic) 1 August 2016