Serbian Radical Party sympathizers in Macedonia made an effort to establish a "Serbian Autonomous Region of Kumanovo Valley and Skopska Crna Gora". In January 1993, 500 Macedonian Serb nationalists gathered in the town of Kučevište, north of Skopje, to protest the police repression against ethnic Serbs on New Year's Eve when 13 Serbian youths were injured. Macedonian Serbs asserted they were mistreated by Macedonian authorities. The post-war years were characterized by the loss of national institutions like the proclamation of the non-recognized Macedonian Orthodox Church (MOC) in 1958–67, that would try to erase the Serbian Orthodox character of Macedonia. Several Serbian Orthodox monasteries have been seized by the MOC, however in the regions with prevailing numbers of Serbs, the Serbian Orthodox Church still has jurisdiction. Further problems between the two arose when Archbishop Jovan VI of Ohrid, the Serbian Orthodox Archbishop of Macedonia, was arrested and sentenced to prison, found Prisoner of conscience by Amnesty. Jovan and other Serbian Orthodox clergymen have been physically attacked and several churches and monasteries in use by the SOC in Macedonia have been destroyed. Since World War II several educational institutions in the Serbian language and common cultural centers have been closed. The number of Serbs in the region has fallen from the 1971 census, when they numbered 46,465 (2.85% of population). According to the 2002 census, there were 35,939 Serbs (1.78%). Non-governmental organization estimate that the Serbs number at 100,000 to 200,000. The Serbs of North Macedonia are mostly concentrated along the northern border with Serbia. They form substantial populations in Kumanovo and Skopje. Although there is another large concentration in south-eastern Gevgelija and Dojran regions. The population with the highest percentage of Serbs is the Čučer-Sandevo municipality with 2,426 Serbs or roughly 28.6% of the population.