The PM to tackle Labor and crossbench citizenship doubts

The Prime Minister says he will use the government's numbers in parliament to refer to the High Court any Labor or crossbench M-P who potentially has citizenship doubts.

Prime minister Malcolm Turnbull listens as Barnaby Joyce claims his victory in the New England by-election Source: AAP

Malcolm Turnbull says the move is a matter for conscience, and not about targeting political opponents.

But Labor says it is unacceptable that only government ministers can refer M-Ps to the High Court.