Sinn Féin Vice President Michelle O'Neill says police have warned the party that dissident republicans are plotting a car bomb attack on one of its members.
She said she was told the attack could happen "anywhere in the north" and said police are taking it "very seriously".
It's the latest threat against the party after it attended the PSNI's recruitment drive earlier this month.
“This is literally a threat against thousands of Sinn Féin members and their families in the north,” Ms O’Neill said in a statement on Monday evening.
The deputy First Minister and her party colleague, Gerry Kelly MLA were informed last week of a dissident plot to attack them.
They said they will not be deterred from their work.
“This is not the first time this particular group have made threats against Sinn Féin members and the PSNI is taking this threat very seriously,” Ms O’Neill’s statement went on.
“We have been told this planned attack could happen anywhere in the north.
“This armed group must withdraw its threat immediately. There is no room for the existence of armed groups. They should disband.”