DAKAR, Senegal — A new crisis is emerging as the Nigerian military liberates droves of women and girls from their Boko Haram captors: Many of the newly freed are being rejected when they return to their communities, according to a report released Tuesday.

The women and girls, many of whom were raped by militants, have been labeled “annoba,” which means epidemics, or “Boko Haram wives,” according to the report from International Alert, a peace-building group, and Unicef. Some community members worry that they have been radicalized by Boko Haram and might try to recruit others to fight with the militant group, which has been terrorizing northern Nigeria for years.

“There is a fear that if the needs of these survivors and returning populations are not met, these factors could add another dimension to an already complex conflict situation in northeast Nigeria,” said Kimairis Toogood, an adviser for International Alert in Nigeria.

As many as 2,000 women and children, both girls and boys, have been abducted by Boko Haram since 2012, according to the report. That includes the more than 200 girls taken from their secondary school in Chibok in 2014 in an episode that attracted huge social media attention with a #BringBackOurGirls campaign, which ultimately had little impact. The Nigerian government conceded recently that it still does not know the girls’ whereabouts.