Macedonia has asked Greece to fully engage its police forces to prevent what it called the violent rioting of migrants and attempts to illegally cross the border.
The call came a day after seven-hour clashes between Macedonian security forces and hundreds of migrants and refugees who attempted to breach the border fence at an impromptu refugee camp housing more than 11,000 people near the Greek village of Idomeni.
Macedonian authorities fired tear gas and rubber bullets, and medical aid agencies said they treated about 300 people.
Macedonia said 14 police offers and nine soldiers were wounded. Greek police did not intervene.
The Macedonian foreign ministry said Skopje has been continuously requesting "cooperation, information sharing and preventive action" from Greece to discourage such incidents.