Half Of A Yellow Sun's release is being delayed in Nigeria by censors, according to the film's director.
Chiwetel Ejiofor and Thandie Newton star in the screen adaptation of Chimamanda Ngozi Adichie's novel about two sisters caught up in Nigeria's 1960s civil war, when the south east tried to form an independent nation called Biafra.
Nigerian-born British director Biyi Bandele tweeted "It's all true" that they were having difficulty with the Nigerian Film and Video Censors Board.
The board has not made any comment on the film's release.
About a million people died in the civil war, most of famine, and Oscar nominee Chiwetel has talked about how his own family were affected by the events.
He said: "It was incredible, I spoke to my grandfather a few years before he died. The conversation took a turn towards his experiences in the war and we ended up doing 10 hours of interviews about it.
"It very closely followed some of the events in this film so I was very moved and engaged to make this film.
"It was a very emotional and powerful journey for me."