Serbia's nationalist prime minister Vojislav Kostunica has resigned and called new elections. The move follows disagreement with his pro-western coalition partners over Kosovo, and Serbia's future links to the European Union. +++LM REIN+++ Kostunica - seen here in recent file pictures - says that fundamental policy differences had brought down the governing coalition. His party wants Brussels to revoke its recognition of Kosovo´s independence, before Serbia joins the EU. But his coalition partners reject any link between EU membership and the status of Kosovo. Kostunica said a snap election would probably be held on May 11th. +++LM RAUS+++