These are the same refugees that Obama wants to import into America.
The ministry says two of the officers have been hospitalized in the border town of Gevgelija.
The clashes erupted after a 24-year-old Moroccan migrant suffered severe burns when he touched a high-voltage cable on the Greek side of the border.
The migrants, already angry about the fact that Macedonia has started to erect a fence on the border, started throwing stones at police officers who were cordoning off the official checkpoint. Some police vehicles were also damaged, the ministry says.
The protesters demanded entry into Europe.