The Hungarian government has announced the deployment

Macedonia, Serbia, Slovenia and Croatia have drastically tightened border restrictions since late 2015, leading to a sharp increase in refugees attempting to breach Hungary's 175-kilometre fence on the Serbian border.

"There have been breaches at various points along the Hungarian-Serbian border," a Hungarian police spokesperson told Al Jazeera, explaining that generally between 100 and 200 people are arrested for crossing the fence each day.

On Tuesday, the police said that 127 people were caught attempting to enter Hungary from Serbia. They are among the 976 people arrested by Hungarian police since March 1 for breaching the fence.