A new video, purportedly from the leader of the Nigerian Islamist militant group Boko Haram, threatens to increase violence in Cameroon unless the neighbouring country embraces Islam.
The video was released on YouTube this week and shows a man firing shots into the air with a Kalashnikov and standing alongside other militants. It is alleged that the man speaking is Abubakar Shekau, the leader of Boko Haram, although this has not been verified. The Nigerian military claimed it had killed Shekau in 2013 but he has appeared in several videos since then claiming to still be alive.
Boko Haram, which means "Western education is forbidden", has killed thousands and kidnapped hundreds as it attempts to create an Islamic state in northern Nigeria. It has also begun targeting neighbouring Cameroon over the last year: on New Year's Day, suspected Boko Haram militants killed at least 15 people in northern Cameroon.
Boko Haram came to international attention in April 2014, when 276 girls from Chibok secondary school were abducted by the militant organisation, leading to the #BringBackOurGirls campaign.
According to Human Rights Watch, Boko Haram has abducted more than 500 women and girls since 2009. These abductions have intensified since May 2013 after Nigeria imposed a state of emergency in areas of the country where Boko Haram is most active.
The latest video addresses Cameroon President Paul Biya.
In pictures: Nigeria kidnapped schoolgirls
In pictures: Nigeria kidnapped schoolgirls
A total of 276 girls were abducted from the northeastern town of Chibok, in Borno state, which has a sizeable Christian community. Some 223 are still missing
One of the kidnapped girls looks into a camera
One of the missing girls talking to the camera
The missing Nigerian schoolgirls, wearing the full-length hijab and praying in an undisclosed rural location. Boko Haram alleging they had converted them to Islam
Girls wearing the full-length hijab holding a flag reading "There is no god, but Allah" and "Mohammed is Allah's prophet"
A man claiming to be the leader of Nigerian Islamist extremist group Boko Haram Abubakar Shekau
Abubakar Shekau speaks on the video
Girls, wearing the full-length hijab and praying are filmed by an unidentified man (R) in an undisclosed rural location
People carry signs as they attend a protest demanding the release of abducted secondary school girls in the remote village of Chibok in Lagos
A protester demonstrates against the kidnapping of school girls in Nigeria, outside the Nigerian Embassy in London
Chief International Correspondent Christiane Amanpour and Prime Minister David Cameron appearing on the BBC1 current affairs programme
People participate in a "Bring Back Our Girls" campaign demonstration and candlelight vigil in Los Angeles
Girls holding heart shaped banners in a "Bring Back Our Girls" campaign demonstration and candlelight vigil in Los Angeles
14/19 South Africa
South Africans protest in solidarity against the abduction of hundreds of schoolgirls in Nigeria by the Muslim extremist group Boko Haram and what protesters said was the failure of the Nigerian government and international community to rescue them, during a march to the Nigerian Consulate in Johannesburg
Karilyn Coates (10) joins others in a candlelight vigil for the more than 300 girls abducted by Boko Haram in Nigeria, at All Souls Unitarian Church in Colorado Springs
Mothers of the missing Chibok school girls abducted by Boko Haram Islamists gather to receive informations from officials. Nigeria's president said that Boko Haram's mass abduction of more than 200 schoolgirls would mark a turning point in the battle against the Islamists, as world powers joined the search to rescue the hostages
Former Nigerian Education Minister and Vice-President of the World Bank's Africa division (3rd L) Obiageli Ezekwesilieze speaks as she leads a march of Nigeria women and mothers of the kidnapped girls of Chibok, calling for their freedom in Abuja
18/19 Bring Back Our Girls
Kelly Hoppen tweeted: 'Please make sure you do this, we must stand together and not forget them'
19/19 Bring Back Our Girls
E.L. Rock Star tweeted: 'Join The Movement'
"I advise you to desist from following your constitution and democracy, which is unIslamic," the man says, reading from a script.
"The only language of peace is to repent and follow Allah, but if you do not then we will communicate it to you through the language of violence."
While the video is difficult to verify, it does follow the style of previous Boko Haram releases, with a bearded man, allegedly Shekau, standing surrounded by masked men with AK-47s, with four-wheel-drives with mounted guns parked behind them.Reuse content