The Swiss attorney general says Sepp Blatter is not part of investigations into alleged corruption by FIFA officials following the president's resignation.
Blatter confirmed his intention to step down on Tuesday after being re-elected for a fifth term on Friday.
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The organization has been rocked by allegations of corruption in recent weeks, but the OAG confirmed Blatter was not under investigation.
"The Office of the Attorney General of Switzerland has taken note of the announced resignation of Joseph S. Blatter as President of the Federation Internationale de Football Association (FIFA)," the OAG said in a statement.
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"The OAG has opened criminal proceedings against persons unknown on suspicion of criminal mismanagement and of money laundering.
"Therefore, Joseph S. Blatter is not under investigation by the OAG. His announced resignation will have no influence on the ongoing criminal proceedings. The OAG will not release any further information."