PARIS - Mali and Burkina Faso must provide guarantees at a summit this week that their domestic political problems do not impede on recent fragile military successes against Islamist militants in the Sahel region, a French presidential source said on Monday.

“All the progress that’s been made is fragile and can put into question if the political momentum does not follow,” the official said ahead of a summit of regional and European leaders on Tuesday to discuss the Sahel crisis.

The official said the situation was particularly concerning given that Malian authorities were no longer discussing a peace plan amid “laborious” political infighting.