The Swiss Attorney General’s office has confirmed a Der Spiegel report that it is investigating Franz Beckenbauer, according to news agency Reuters.
In February Beckenbauer was warned and fined by Fifa’s ethics committee for “failing to co-operate” with Fifa’s inquiry into the bidding processes for 2018 and 2022 World Cups, won by Russia and Qatar respectively.
Fifa did not look into matters relating to the awarding of the 2006 World Cup to Germany.
The 70-year-old was head of the tournament’s organising committee which, reports alleged, made a payment to Fifa in return for a financial grant.
In October 2015, he said he made a “mistake” in the bidding process but denied votes were bought.
Beckenbauer captained Germany to the 1970 World Cup and managed them to success in the same tournament in 1990.