"The OSCE Mission to Croatia today condemned a series of bomb attacks that occurred over the weekend in the Vukovar area," the press release reads.
"Incidents like this, coming so soon after local elections which were held in a tolerant and democratic atmosphere, are very worrying," read the release issued by the spokeswoman for the mission, Antonella Cerasino.
"We fully concur with Prime Minister Ivo Sanader in hoping that these incidents do not undermine coexistence and reconciliation in this part of Croatia and throughout the entire country. We trust that the police investigations will identify the perpetrators and lead to their prosecution," the spokeswoman said.
She added that other recent incidents, such as the murder of a Serb in the village of Karin Gornji (Zadar hinterland) and fighting between Serb and Croat students near Vukovar "could raise ethnic tensions".
The first blast of a mine occurred in Vukovar on Friday night. In the night between Saturday and Sunday two other explosions took place in the municipalities of Trpinje and Borovo, both of which are mainly populated by ethnic Serbs. No one was injured.