Energy companies should justify their prices to customers, a government spokesman has said.
Energy suppliers are responsible for their prices and must justify those prices to their customers.
The best way to keep prices down is to introduce more competition, and our reforms have led to the number of suppliers trebling since 2010.
We also support Ofgem's proposal for a full investigation into competition in the energy market."
More top news
Detectives investigating the Parsons Green terrorist attack have arrested a 17-year-old boy in Thornton Heath, south London.
Speaking to ITV News Foreign Office minister Tobias Ellwood said education was the greatest weapon in the fight against extremism.
A review of the law is being considered after a cyclist who crashed into and killed a mother-of-two was convicted using a Victorian law.