The protesters, who were chanting "Open the border!" and throwing stones at Macedonian police, were repelled. There were no reports of arrests or injuries from Monday`s clashes.
Police said 500 people earlier pushed their way past Greek police to reach the gate used to let trains through at the border crossing.
About 6,500 people are stuck on the Greek side of the border. Some have been there for up to eight days with little food or shelter as Macedonia only accepts a trickle of people every day.
Macedonian police fire tear gas at migrants
29 February 2016
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Macedonian police have fired tear gas and stun grenades after a few hundred migrants angry at long delays in entering Macedonia broke a gate on the Greek-Macedonian border.
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