Nigeria's President Goodluck Jonathan will on Friday visit the north-eastern town where more than 200 schoolgirls were abducted, officials have said.
Nothing was seen of the girls for almost a month after they were taken from Chibok by Boko Haram militants.
But on Monday the group released a video showing more than 100 of them and offering an exchange for prisoners.
The president has come under pressure over his government's failure to rescue the girls, but has ruled out a swap.
The UK's Africa Minister Mark Simmonds said Mr Jonathan "made it very clear that there will be no negotiation", at a meeting on Wednesday.