UPDATE: Rory CL at the BBC tweeted that there has been no leak of radioactive materials.
AFP is reporting an explosion at Marcoule, located in the Chusclan and Codolet French communes, near Bagnols-sur-Cèze in the Gard department, within Côtes-du-Rhône region. Marcoule site of first industrial and military plutonium experiments. Diversification of the site was started in the 1970s with the creation of the Phénix prototype fast breeder reactor, and is today an important site for decommissioning nuclear facilities activities.
BBC reports: “One person was killed and three were injured in the explosion, following a fire in a storage site for radioactive waste.”