Video report by ITV News Correspondent Juliet Bremner
Boko Haram has reportedly released a video appearing to show some of the Chibok schoolgirls kidnapped by the Islamist group.
The group kidnapped 276 girls from their school in the northern town of Chibok in April 2014, of which 219 are believed to remain in captivity.
In the video, which was seen by Reuters, around 50 girls can be seen behind a militant who is reportedly demanding the release of fighters in return for the girls' freedom.
The militant in the video claims five of the Chibok girls were killed by Nigerian military jets during an attack on the group's compound.
He says in the footage: "We want to send this message first to the parents of these girls for them to know that these girls are still with us, someof them, and secondly they should tell the federal government of Nigeria, to with immediate effect, release our imprisoned brothers.
"Some of the girls, about 40 of them with god's permission have been married, some of them have died as a result of bombing by the infidels."
It is not known when the video was filmed and it has not been verified.
This is the third video said to show the girls since they were captured.
The kidnapping by the Nigerian terror group in April 2014 sparking worldwide outrage and an online campaign 'Bring Back Our Girls' which was supported by US First Lady Michelle Obama and human rights activist Malala Yousafzai.