(ANSA) - BELGRADE, SEP 2 - Several hundred local Serbs have gathered in the northern (Serbian) sector of Mitrovica since this morning in front of the public offices where they work, which were closed by the Kosovar police last Friday in an operation to put an end to what Pristina believes are illegal activities by parallel Serbian structures in Kosovo. The employees request to be allowed to go to their workplaces, but the officers keep them at a distance. (ANSA).