New IRA threats against Sinn Fein are “stupid” and “dangerous”, a senior republican said.

All party members have been warned of a dissident plot to launch an under-car bomb attack.

Gerry Kelly, the party’s policing spokesman, said it would not deter elected representatives but would worry members of their families.

He said: “Their reaction to a surge in republican support is to actually threaten republicans.

“It is stupid but it is dangerous.”

Last week, Michelle O’Neill, Stormont’s Deputy First Minister, said officers had warned that dissident republicans were planning to attack her and Mr Kelly.

It came in response to the pair’s attendance at a Police Service of Northern Ireland recruitment event.

On Monday night, Ms O’Neill indicated that the plot had widened to encompass all Sinn Fein members.

She said police had advised that the New IRA was the dissident grouping behind the plan.

“That is when it comes home to you.

“It was part and parcel of what we were as political representatives involved in, so it is the families I think will worry most.

“I can also say with considerable confidence that there is probably not a single Sinn Fein representative who will be deterred from pursuing what we have been pursuing, which is an Ireland of equals.”