Fifa corruption claims: Key questions answered

Fifa, football's governing body, has been hit by two corruption inquiries. Seven Fifa officials have been arrested in Switzerland at the request of the US authorities after they were indicted for corruption. The amounts involved are alleged to be above $150m (£97m).

Hours later, the Swiss authorities launched their own criminal inquiry into the bidding process for the 2018 and 2022 World Cups. Swiss police raided Fifa's headquarters in Zurich and seized electronic evidence.

Why does this matter?
Who's accused of corruption?
Why were the officials arrested?
Why Switzerland?
How much money is involved?
Will the Russia 2018 or Qatar 2022 World Cup be moved?
Will Sepp Blatter still win a fifth term as president?

Fifa corruption claims: Key questions answered - BBC News