Reported on Twitter that the 2 x Tu-160s departed South Africa last night.
The bombers are part of the Russian Aerospace Force’s air group, which is visiting South Africa under an agreement on military cooperation signed between the defense ministries of both countries in the summer of 1995.
From Tass News Agency.
https://tass.com/defense/1084851
The Tu-160 visit was apparently to take place during 2016 for a defence exhibition.