No Bru refugee returned, Mamit district SP H Sangawia told a news agency over phone from Kanhmun Facilitation camp, one of the two transit camps where the repatriated Brus were to be received by Mizoram officials.
All officials who had gone to the relief camps returned at 2 pm, he said.
Preparations had been made for the return of 811 people belonging to 153 families from Khakchangpara relief camp during the day.
Only 41 refugees belonging to seven families have returned since the fourth phase began on April 26.
Official sources said that anti-repatriation elements were intimidating the refugees and those willing to return to Mizoram dared not do so.
Anti-repatriation elements among the refugees were demanding a number of things including formation of autonomous district council for Brus in Mizoram.