On Tuesday, there was a series of similar breakouts in the same area involving several hundred people, with police using pepper spray on one occasion to move a group off a main road.
Hungary's southern border with Serbia has become a major entry point into the European Union for migrants and refugees fleeing war and misery in the Middle East and Asia.
More than 165,000 migrants have crossed into Hungary so far this year.
Most seek to travel on to Germany via Austria.
Hungary recently completed a razor-wire barrier along its 175-kilometre (110-mile) frontier with Serbia, but it has failed to stop large numbers of people getting through.
It is currently building an additional four-metre (13-foot) fence despite widespread criticism, with France's foreign minister saying the barrier does "not respect European values".


AFP