Hamas has informed Fatah of its opposition to the Palestinian unity government, Hamas spokesman Sami Abu Zuhri said.
"Hamas's final position is that we don't agree to the formation of a government that does not include a Ministry for Prisoners Affairs," Abu Zuhri said.
The Hamas spokesman said his movement would consider Palestinian Authority President's announcement of the new government a "unilateral" step. Hamas, he added, will not recognize this announcement.
The announcement is expected to come on Monday at 1 p.m.
On Sunday, Prime Minister Binyamin Netanyahu called an emergency cabinet meeting a night ahead of the planned Palestinian Authority-Hamas formal unity government declaration.