On 30 December, the HV launched sub-operation Širinci '92 west of Nova Gradiška. The HV briefly captured the village of Širinci, advancing west from Mašićka Šagovina and moving within of the Okučani–Lipik road. The JNA quickly pushed the HV out of Širinci the same day. West of Pakrac, the HV successfully defended Kusonje against a fresh attack and continued a mop-up along the Pakrac–Požega road, capturing the village of Prgomelje near Pakrac the same day. On 3 January 1992, the HV unsuccessfully tried to advance to the village of Donja Šumetlica, south of the road. It managed to recapture Širinci just before a general ceasefire negotiated to implement the Vance plan came into effect that day, and further offensive activities were halted.