The four, who include former football federation head Sani Lulu Abdullahi, are due to appear in court in the capital Abuja shortly, an anti-corruption official told the BBC.
But instead it has only underlined how little may have changed: Daniel Noa, Siemens' top anti-corruption official, has stepped down after only six months at the company, with little explanation given.
The Cambodian government told CNN a senior Cambodian court official was investigated for corruption, but was exonerated.
The Pakistani Supreme Court has set up its own inquiry into the death of an official who was investigating corruption allegations against Prime Minister Raja Pervez Ashraf.
He was the highest-ranking official to be arrested for corruption in five years.
The son-in-law of Spain's King Juan Carlos I has agreed to step down from official duties amid a rare corruption scandal for the royal family.
High-profile prosecutions of former local-government officials are a sign that there will no longer be official tolerance of the kind of corruption that was so blatant in Casablanca, where funds allocated for slum clearance and other projects in the 1990s were diverted into private pockets.
ECONOMIST: The king is seeking to embrace moderate Islamists
"Singapore and FAS have a zero-tolerance policy when it comes to match-fixing and football corruption which includes the imposition of permanent suspension from all football activities on any player or official convicted in a court of law for football corruption offences, " the FAS said in a statement.
Her aides are particularly concerned about Luiz Antonio Pagot, a former senior transport official who resigned last year after being accused of corruption.
The campaigner says India's proposed anti-corruption ombudsman should be able to investigate any official - including the prime minister and judges.
Some reformist groups also object, arguing that the changes do not strengthen civil institutions enough, and raise the scope for corruption by lessening the time required between a public official's leaving office and his standing in some election.
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