Article published on the 2009-12-09 Latest update 2009-12-09 14:58 TU
Bosc had "never overstepped his mandate" and had shown "a high degree of professionalism in his contacts with all legal political parties," said Foreign Ministry spokesperson Bernard Valero.
Yamgnane, 64, is to be a candidate in Togo's February 2010 presidential elections and will challenge the current president Faure Gnassingbe, who has been in power since 2005.
Yamgnane has had close ties to the French government, as he served as Secretary of State for Integration in France under François Mitterrand from 1991 to 1993.
He was also a Socialist deputy in Finistère, in western France, from 1997 to 2002. He moved back to Togo one year ago.