Macedonia sent back hundreds of refugees to Greece on Tuesday, a day after they bypassed a border fence in a mass push to continue their journey north to Europe's prosperous heartland - a move Greece blamed on "criminal misinformation" possibly spread by volunteers working with them. Interior Ministry spokesman Toni Angelovski told The Associated Press the migrants "have been returned to Greece." About 1,500 people, frustrated at being stuck for weeks in a waterlogged tent city outside the closed crossing of Idomeni, pushed their way into Macedonia on Monday through an unguarded section of the border. They walked about 5 kilometers (3 miles) and forded a swollen stream near the Greek village of Hamilo. A Macedonian official said 700 migrants who had been detained overnight were deported to Greece through the same location they entered. The official, who spoke on condition of anonymity because he was not authorized to discuss the matter with the press, also said about 50 journalists and volunteers detained with the migrants were released after paying fines of 250 euros ($280) for illegally entering Macedonia, AP reported.