KHARTOUM, Sudan (CNN) -- The prosecutor of the International Criminal Court was expected by diplomats to seek the arrest on Monday of the Sudanese president on charges of genocide in a five-year campaign of violence in the country's Darfur region.
About 1,000 Sudanese rallied in Khartoum Sunday against the possible charges.
But the ruling National Congress Party of Omar Hassan al-Bashir has warned of "more violence and blood" in the huge western region of Darfur if the president is charged, state TV reported.
Al-Bashir, who seized power in a 1989 coup, got a show of support Sunday as he arrived for an emergency meeting of his cabinet.
A crowd of about 2,000 people, some chanting "Down, down, USA," greeted the president when he appeared on his way to the council of ministers meeting.
Others held signs ridiculing the ICC and its prosecutor, Luis Moreno-Ocampo of Argentina. "Ocampo is a plotter against Sudan's people," one banner read, according to The Associated Press.
Moreno-Ocampo has refused to comment, saying only that he will present his evidence to judges on Monday.
A three-judge panel at the court, based at The Hague in The Netherlands, will study the case before deciding whether to issue an arrest warrant.
The ICC warrant would make al-Bashir the first sitting president to be indicted for genocide.
"We have been hearing that this prosecutor is going to announce some names, possibly the leadership of the country, that will be indicted," Sudanese Ambassador to the United Nations Adbalmahmood Abdalhaleem Mohamad told CNN Friday. "It is a criminal move that should be resisted by all."