The European Union’s top diplomat said on a letter to member state foreign ministers that they have to focus on global geo-political issues such as firm links between the EU and the Western Balkans.

EU High Representative Josep Borrell said in the letter that his priority is acting in support of a comprehensive agreement between Belgrade and Pristina and getting Bosnia-Herzegovina on the path to stability.

Borrell’s letter comes before Tuesday’s EU-Serbia Inter-governmental conference which is expected to open a new chapter in the country’s accession talks.

The EU High Representative wrote that EU member states have to reach agreement on how the expansion process will continue, adding that he will urge them to agree a new expansion methodology before the EU-Western Balkans meeting in May next year.