Croatia on Thursday closed seven of the country's eight border crossings with Serbia "until further notice", following a massive influx of migrants and refugees, the interior ministry said.

"Traffic is banned on the border crossings of Tovarnik, Ilok, Ilok 2, Principovac, Principovac 2, Batina and Erdut," the ministry said in a statement.

More than 11,000 migrants have crossed from Serbia into Croatia since early Wednesday, the ministry added.