1992 Main articles: Prijedor ethnic cleansing, Operation NAME_1 '92, Operation Corridor 92, Siege of Sarajevo, Bijeljina massacre, and Siege of Žepa  A victim of a mortar attack delivered to a Sarajevo hospital in 1992 The war in Bosnia escalated in April.[140] On 3 April, the Battle of Kupres began between the JNA and a combined HV-HVO force that ended in a JNA victory.[141] On 6 April, Serb forces began shelling Sarajevo, and in the next two days crossed the Drina from Serbia proper and besieged Muslim-majority Zvornik, Višegrad and Foča.[138] According to the International Criminal Tribunal for the former Yugoslavia, in 1992, after the capture of Zvornik, Bosnian Serb troops killed several hundred Muslims and forced tens of thousands to flee the area.[142] All of Bosnia was engulfed in war by mid-April.[138] On 23 April, the JNA evacuated its personnel by helicopter from the barracks in Čapljina,[143] which had been blockaded since 4 March.[144] There were some efforts to halt violence.[145] On 27 April, the Bosnian government ordered the JNA to be put under civilian control or expelled, which was followed by a series of conflicts in early May between the two.[146] Prijedor was taken over by Serbs on 30 April.[147] On 2 May, the Green Berets and local gang members fought back a disorganised Serb attack aimed at cutting Sarajevo in two.[146] On 3 May, Izetbegović was kidnapped at the Sarajevo airport by JNA officers, and used to gain safe passage of JNA troops from downtown Sarajevo.[146] However, Bosnian forces attacked the departing JNA convoy, which embittered all sides.[146] A cease-fire and agreement on evacuation of the JNA was signed on 18 May, and on 20 May the Bosnian presidency declared the JNA an occupation force.[146]  Please extract incidents as comma separated csv in the format of time, actor, incident. For example: 2022-11-12, "US, UK, China", "Obenheimer Peace Talks"