Nigerian schoolgirls who were abducted earlier this month by members of the terrorist group Boko Haram are now being forced to marry their captors, according to a civil society group in the region.

Halite Aliyu, spokeswoman for the Borno-Yobe People’s Forum, said parents of the girls were told their children were being sold to their abductors for 2,000 naira, or about $12. The parents were informed of their daughters’ fates by villagers in the Sambisa Forest near known Boko Haram camps, according to the Associated Press.

“The latest reports are that they have been taken across the borders, some to Cameroon and Chad,” Aliyu said.

More than 200 girls (possibly fewer, as reports have varied) were abducted two weeks ago from their school in northeast Nigeria. About 50 girls have escaped since the kidnapping.