Ukraine's justice minister is threatening to call for a state of emergency unless protesters leave her ministry building, which they occupied during the night, according to AP.The seizure of the building early Monday underlined how anti-government demonstrators are increasingly willing to take dramatic action as they push for the president's resignation and other concessions. Protesters now occupy four sizable buildings in downtown Kiev, including the city hall.Justice Minister Elena Lukash said early Monday that she would ask the national security council to impose a state of emergency if the protesters don't quit the building. But she did not specify a deadline for leaving.