The Czech Republic announced on Monday it would send soldiers and equipment to neighbouring Hungary to help secure Europe's borders in the face of an unprecedented influx of migrants.

"About 25 soldiers" will be stationed in Hungary -- the migrants' main entry point to the European Union -- from October 15 to December 15, Czech Defence Minister Martin Stropnicky told reporters.

Prague would also send engineering equipment, he added.

So far this year, Hungary has seen some 300,000 migrants fleeing war and poverty to western Europe cross its frontiers.

To deter migrants entering Europe's Schengen-free passport zone, Hungary's conservative government has built a razor-wire fence along the border with non-EU member Serbia and is currently building another such fence on the border with Croatia.

"More and more EU politicians talk about the need to guard the external border of the Schengen area...but remain silent on how," Stropnicky wrote Monday on his Twitter account.

"We will not wait and will help the Hungarians," he added.