Who carries out investigation for election-related criminal offenses?

Tajikistan
Criminal Code Of The Republic Of Tajikistan (1998-05-21)
Legislationline,
http://legislationline.org/download/action/download/id/1707/file/207b8150765af2c85ad6f5bb8a44.htm/preview as retrieved on 2013-10-26.
TheConstitutional Law of the Republic of Tajikistan 'On Elections to theMajlisi Oli of the Republic of Tajikistan' (1999-12-10 and amended on2004-06-16)
Legislationline,
http://legislationline.org/documents/action/popup/id/6930 as retrieved on2013-10-28.
Constitutional Law Of TheRepublic Of Tajikistan “On the Election of the President of the Republic ofTajikistan” (1994-07-21) (With amendments as of January 1,2006)
Legislationline,