The National Organizer of the New Patriotic Party, Henry Nana Boakye, has publicly criticized the Office of the Special Prosecutor.
Mr Boakye stated that the Special Prosecutor's investigation into vote buying during the party's presidential primaries was handled irresponsibly.
These investigations concern alleged financial inducements during the recent internal elections.
The Office of the Special Prosecutor had previously announced its intention to investigate these claims.
Mr Boakye's comments highlight growing tension between political figures and the anti-graft institution.