President Otto Perez Molina says he won't resign from office despite investigators saying he may have been involved in a customs fraud scandal that has thrown the country into political crisis.

Perez denies receiving any money from the fraud ring and says his conscious is clear.

He also apologized late Sunday to Guatemalans for the corruption that has wracked his administration. Ex-Vice President Roxana Baldetti was detained Friday as a suspect, and government leaders resigned over the weekend to protest the scandal. Even business chambers normally supporting Perez Molina asked him to resign. Investigators are seeking to revoke the president's immunity from prosecution in the case.

The scandal involved kickbacks paid by businesspeople to avoid import duties and is believed to have defrauded the state of millions of dollars.