The lower house of the French Parliament passed a proposal to amend the constitution to strip people convicted of terrorist offences of their French nationality.
The National assembly voted by 162 to 148 late last night to incorporate a passport-stripping clause into the Constitution, despite doubts by some lawmakers that it is too extreme.
However, a follow-up vote is scheduled for today in which the lower house will reaffirm the vote.
Earlier yesterday, parliament voted to extend the current state of emergency by another three months, giving police and security forces increased powers.
French President Francois Hollande launched the long process to change in the Constitution after the November 13 Paris attacks by Islamic State of Iraq and the Levant (ISIS) terror group that killed 130 people.