Migrant crisis: 'There are still migrants getting through the fence'
Hungary has begun a new fast-track process for considering asylum applications, at crossing points into the country from the south.
Many migrants on the Serbian side are being allowed into fenced enclosures where their cases will be considered within hours.
The BBC's Christian Fraser is on the Hungarian side of the Hungarian-Serbia border near an official crossing site.
He says while it is very secure, there are some weak points along it.