KEY POINTS
  • EU antitrust officials confirmed Saturday they had started investigating allegations of a cartel among a group of German carmakers.
  • BMW rejected reports of emissions collusion while other carmakers have reportedly refused to comment on the claims.
  • The automotive industry accounts for about 20 percent of Germany's industry revenue and employs approximately 800,000 people.
(L-R) Dieter Zetsche, CEO of the German car maker Daimler AG, Harald Krueger, CEO of the German car maker BMW and Matthias Mueller, CEO of German car maker Volkswagen AG, shake hands after a talk at the so-called Auto-Gipfel - automotive meeting - in Munich, southern Germany, on November 9, 2016.

Shares in the top three German carmakers dropped sharply on Monday after it was reported that EU antitrust officials had started investigating a possible breach of regulatory standards.

Volkswagen, BMW and Daimler all slumped towards the bottom of the autos sector shortly after Monday's opening bell. BMW fell more than 2 percent while Volkswagen and Daimler slid over 3 percent on the news.