Who carries out investigation for election-related criminal offenses?

Israel
Article128: Jurisdiction
In respect of offences under thischapter, except section 117 –
1- Jurisdiction to try the same and toimpose the penalties prescribed shall vest in the Magistrates’ Courts;
2- The Attorney general shall not haveauthority to order a stay of proceedings.
Source: Knesset elections law, law No.5729/1969
http://www.bechirot.gov.il/elections19/eng/law/ElectionsLaw1969_eng.pdf