An explosion has been reported at a branch of McDonald's in Grenoble, France.
Initial reports suggest no-one was hurt, but the blast is thought to have been deliberate.
Police teams and the bomb squad are on site.
According to the Agence France-Presse, the explosive was a firecracker lit in a toilet which then led to a fire and the evacuation of 30 people from the restaurant.
The authorities have advised people to avoid the area for the time being, and have ordered a search of all McDonald's premises around the city.
Forensic scientists were also summoned from Lyon by helicopter to help deal with the situation.
Traffic has been diverted around the area, with public transport similarly being routed around the area.
Grenoble is located in southeastern France within the French Alps, and is the country's second-leading region for tourism.
More to follow.