Municipal, state and federal security elements began an operation to find the businessman and those responsible for the crime.
Salamanca authorities said they “are taking all necessary measures to address this incident.”
Arrendondo competed for the municipal mayor of Salamanca, championed by the National Action Party (PAN).
Salamanca recently made headlines for a massacre that occurred during an amateur soccer match.
Guanajuato has topped the lists of violent states in recent years.
