The Slovenian government has confirmed that it plans to put up an additional 40 kilometres of "anti-migrant" fencing along the border with Croatia, but would not specify at which locations, citing confidentiality reasons, the Ljubljana newspaper Delo said on Tuesday.

Temporary barriers will be set up in accordance with government decisions “which have been made in secrecy because these are important data,” the Ministry of the Interior told the newspaper.

Slovenia has already set up a 196-km-long fence along the border with Croatia to prevent migrants from the Middle East and other conflict-affected regions entering the country illegally. The fence includes 116 km of razor-wire fencing and 80 kilometres of panel fencing, and now the government plans to put up an additional 40 kilometres of panel fencing by the end of the year.

Delo said that about 1,800 migrants had entered Slovenia in the first quarter of this year and a large majority of them had been returned to Croatia as part of a readmission agreement.