The proscribed Indigenous People of Biafra (IPOB) says it will enforce a sit-at-home order on October 1.
Nigeria will mark its 61st independence anniversary on October 1.
In a statement on Saturday, Emma Powerful, IPOB spokesman, said the group will also bring down Nigerian flags in the south-east region.
Powerful said the proscribed group is taking these actions in solidarity with Ambazonia, a secessionist group in Cameroon, whose purported independence anniversary is on October 1.
“IPOB has declared 1st of October 2021 total shutdown in Biafra land as a sign of our rejection of the construct called Nigeria and there shall be no movement in Biafra land on this day,” he said.
“Also IPOB has declared from today, 25th September 2021, that all Nigerian flags mounted anywhere in Biafra land must be brought down, banks exceptional.
“IPOB leadership will communicate to Banks directly and give them reasons they must peacefully bring down the Nigerian flag in their banking premises before we do it ourselves in our own way.
“Everybody must strictly adhere to these directives from IPOB leadership, we want to let the world know that Biafraland is not Nigeria and shall not be.
“We advise Biafrans to stand with Ambazonia people as they celebrate their God-given freedom and independence.”