During the referendum on 1 March, Sarajevo was quiet except for a shooting on a Serbian wedding. The brandishing of Serbian flags in the Baščaršija was seen by Muslims as a deliberate provocation on the day of the referendum, which was supported by most Bosnian Croats and Muslims but boycotted by most of the Bosnian Serbs. Nikola Gardović, the bridegroom's father, was killed, and a Serbian Orthodox priest was wounded. Witnesses identified the killer as Ramiz Delalić, also known as "Celo", a minor gangster who had become an increasingly brazen criminal since the fall of communism and was also stated to have been a member of the Bosniak paramilitary group "Green Berets". Arrest warrants were issued against him and another suspected assailant. SDS denounced the killing and claimed that the failure to arrest him was due to SDA or Bosnian government complicity. A SDS spokesman stated it was evidence that Serbs were in mortal danger and would be further so in an independent Bosnia, which was rejected by Sefer Halilović, founder of the Patriotic League, who stated that it wasn't a wedding but a provocation and accused the wedding guests of being SDS activists. Barricades appeared in the following early morning at key transit points across the city and were manned by armed and masked SDS supporters.