Over the past 24 hours, more than 10,000 migrants, many fleeing violence in Syria, have arrived in Slovenia, the smallest country on the Balkan migration route, on their way to Austria.
"Slovenia has already asked other EU member states for police units," Znidar said late on Wednesday.
European Commissioner for Migration and Home Affairs Dimitris Avramopoulos on Thursday will visit Slovenia to discuss the migrant crisis, while Commission President Jean-Claude Juncker called an extraordinary meeting of several European leaders for Sunday.
Juncker invited the leaders of Austria, Bulgaria, Croatia, the former Yugoslav Republic of Macedonia, Germany, Greece, Hungary, Romania, Serbia and Slovenia.
Slovenia's parliament has given more power to the army which is helping police control the border, while the country also plans to rehire retired police to help.
Huge number of migrants started coming to Slovenia on Saturday after Hungary on Friday sealed its border with Croatia with a bottleneck building up through the Balkans.