Prime Minister Valls of France said on Friday he was "open" to a temporary ban on the foreign financing of mosques as a measure against extremism.

In an interview with the Le Monde published on Friday, Valls spoke of "failure" because one of the jihadists who killed a priest earlier this week was electronically tagged.

He said the suspect awaiting trial should have never been release.

The jihadist killing of a priest at the altar of his church opened a new set of “soft targets” with the...