Colombian President Juan Manuel Santos writes his vote during a referendum in Bogota, capital of Colombia, Oct. 2, 2016. The country's eligible voters on Sunday joined the referendum to approve or sink the full peace agreement reached by the government and the Armed Revolutionary Forces of Colombia to end armed conflicts.[Photo/Xinhua]

BOGOTA - The future of the Colombian peace process plunged into doubt on Sunday as a national vote on whether to accept the agreement with the Revolutionary Armed Forces of Colombia (FARC) went down to the wire, with the No camp taking a razor-thin lead.

While weeks of polling had shown a clear lead for the Yes camp, the No camp led by 50.23 percent to 49.76 percent for Yes with 99.69 percent of votes counted.

This will come as a massive blow to the government of President Juan Manuel Santos and the FARC, who came to a peace treaty in August after four years of negotiations.

The future of Colombia's peace process is now uncertain, since the FARC's willingness to disarm, gather in special zones across the country and transition to a political party relied on public acceptance.