European Union member Croatia is from today limiting the number of migrants entering the country to 580 a day, following a similar decision from neighbouring Slovenia.
"Slovenia informed us yesterday evening that they can receive 580 migrants daily and we have informed our colleagues in Serbia about it. We will stick to that figure also," Croatian police spokeswoman Jelena Bikic said.
Serbia also said it would follow the decisions of countries further up the Balkans migrant route and limit the numbers entering its territory.
"Like we have done so far, whatever Austria, Slovenia and Croatia do, we will do the same. If they accept only 500 we will let 500 go through Serbia," an official from the labour ministry, which is in charge of refugees, told AFP.
"We will adjust to this new regime," the official said.
Countries have begun tightening their controls after Austria introduced a daily cap of 80 asylum-seekers last week and said it would let only 3,200 migrants pass through each day.
The more stringent measures have already left thousands of people stranded in Greece, the main entry point into the EU for most migrants and refugees.
Europe has seen 100,000 migrants arriving on its shores so far this year on top of the one million who made the journey in 2015.
