The bilingual signs with Latin and Cyrillic script which were installed on the from the Vukovar government, police and tax administration buildings on Monday morning were taken down soon afterwards by several dozen Croatian veterans who defended the city which was devastated by Serb forces in the 1990s war.
Tensions remained high during the day with dozens of police officers maintaining a high profile in the city to prevent unrest.
Vukovar police said that four officers were injured during scuffles with protesters, but there were no arrests.
The leader of the war veterans, Tomislav Josic, vowed at a press conference in Vukovar that the resistance would continue and “the city will boil until Friday”.
“Our friends from all over Croatia would come and help us tear down the signs,” Josic said.
“Cyrillic once came to Vukovar on tanks, and now it is coming with powerful police forces and cars,” he added.