"Every time we tried to get out they obstructed us. During the final attempt, they released police dogs on us... They just told us: go back ...
Austria said 9,000 people had crossed from Hungary on Saturday.
The best pictures of the year of refugees and the migrant crisis.
Authorities said over 140,000 migrants had entered Hungary from Serbia to far this year
Police said a record 2,533 migrants - most of them from Syria, Afghanistan and Pakistan - were caught entering Hungary from Serbia...
Border crossings have been fitted with gates of steel and concrete.
Migrants can now find themselves in court within days of crossing the fence.
The political rift is greater across Europe, with Hungary accusing Berlin of encouraging the influx.