Update on the grenade explosion at Le Mans: Four grenades were thrown into the courtyard of a mosque in the French city of Le Mans. One of the grenades exploded, but no injuries were reported, local French daily Ouest-France reports.

Three of the unexploded grenades were discovered by police. Police have cordoned off the mosque and so far no arrests have been made. According to reports, a gunshot was also reported overnight, with the bullet hitting the mosque.

French police have noted several attacks against mosques since Wednesday, when gunmen opened fire on the Paris office of the French satirical weekly Charlie Hebdo.

Pic: People gather in solidarity against the Charlie Hebdo massacre last night in Paris, holding up banners that say, Not Afraid.