French state-controlled power group Electricite de France SA (EDF.FR) said Friday a fire started on a transformer at its nuclear plant in Cattenom, eastern France, adding that it was outside the nuclear-processing area.

In a tweet, EDF said the fire had been put out and that no one had been hurt during the incident.

EDF's unusual form of announcement underscores the group's wariness after a series of fires at several of its nuclear plants last year triggered a massive public outcry.

EDF is the world's largest nuclear operator, with 58 reactors in
France alone, a country where until the nuclear catastrophe of Fukushima in Japan two years ago, the use of nuclear power was unquestioned.