Macedonia suddenly allowed more than 1,500 migrants, most of them fleeing the conflict in Syria, to cross from northern Greeece late on Saturday after they spent more than three days in a no man's land between the two countries, newswires reported. Earlier on Saturday Macedonian security forces fired stun grenades at the crowds for the second day in an increasingly futile attempt to block growing numbers of migrants entering the country. Overwhelmed by the migrants, police apparently gave up attempts to stem their flow from Greece to western Europe. Macedonian authorities have provided extra trains from Gevgelija, on Macedonia’s southern border with Greece, to Tabanovce, on the northern border with Serbia, from where migrants are heading to Hungary and then on to northern and western Europe.