By Fatos Bytyci MITROVICA, Kosovo (Reuters) -Kosovan Interior Minister Xhelal Svecla on Tuesday said Serbia, under the influence of Russia, was aiming to destabilise Kosovo by supporting the Serb minority in the north who have been blocking roads and protesting for almost three weeks. Serbs in the ethnically divided city of Mitrovica in northern Kosovo erected new barricades on Tuesday, hours after Serbia said it had put its army on the highest combat alert following weeks of escalating tensions between Belgrade and Pristina. “It is precisely Serbia, influenced by Russia, that has raised a sta…