Leading French energy companies - Engie, EDF and TotalEnergies - are concerned about the rapid growth in the cost of raw materials caused by a reduction in supplies from Russia. This was reported by Le Journal du Dimanche, citing a corresponding open letter.

The message contains an appeal to the population and businesses "immediately" to limit the consumption of electricity, gas and oil products.

"We call for awareness and collective and individual action so that each of us - each consumer, each company - change their behavior and immediately limit the consumption of energy, electricity, gas and oil products," the letter says.

The energy crisis is said to be a serious threat to France's social and political cohesion.