Prosecutors say they have targeted 150 suspects at 50 companies. RWE and Deutsche Bank say they are cooperating with police and are not the specific focus of investigations.

RWE says the investigations concern a company that had business relations with RWE Supply & Trading in 2009, rather than the company itself.

The investigations centre around the so called “carousel fraud” in Germany, France, the UK and the Netherlands, whereby carbon traders can collect value added tax using front companies and then dissolve them before turning it in to the government.

Some