Greece's government is appealing to volunteers and aid groups working with desperate refugees on the border to make sure the migrants don't get misinformation like reports that led hundreds to leave a refugee camp on a failed, hours-long trek to try to enter Macedonia.

Migration affairs spokesman Giorgos Kyritsis said Monday the government was trying to communicate directly with refugees in the Idomeni camp on Greece's northern border and was sending in a team of interpreters. The move comes after refugees said activists in Idomeni had been urging people over the weekend to march on the Macedonian border, saying it would be reopened.

Two weeks ago, similar rumors saw more than 1,000 people attempt to enter Macedonia by crossing a swollen creek, only to be arrested and sent back.