Mexico's main liaison officer with Interpol has been arrested as part of an inquiry into suspected links between officials and drug traffickers, BBC reported.
Ricardo Gutierrez has been placed under house arrest. He can be held for up to 40 days while allegations against him are being investigated.
At least three other Mexican officials have been arrested in recent weeks in connection with "Operation Clean-up".
About 4,000 people have died this year in drugs-related violence in Mexico.
Correspondents say the surge in violence is related in part to the successes the Mexican authorities have had in recent months in arresting key members of powerful drug cartels.
Operation Clean-up is aimed at weeding out officials with alleged links to the traffickers.
The investigation into Mr Gutierrez stems from information prosecutors say was obtained following the arrest of a suspected drug baron in January.
The cartels control both the internal market and the lucrative flow of drugs across the border to the US.