The Islamic State (Isis) terror group has appointed a new leader for its branch in West Africa, the Nigeria-based Islamist outfit Boko Haram. Abu Musab al-Barnawi replaced Abubakar Shekau, who became the leader of Boko Haram in 2009.

Al-Barnawi was Boko Haram's spokesperson. "He [Al-Barnawi] personally distanced himself from the killing of Muslim civilians by Boko Haram in 2012," David Otto, CEO of global security provider TGS Intelligence Consultants, told IBTimes UK.

In 2015, Al-Barnawi appeared in a Boko Haram video as the group's spokesperson. A few months later, Boko Haram was believed to have released a video featuring Shekau.

However, the unusual poor quality of the footage raised suspicions over its authenticity. Furthermore, the video was only shared on YouTube, rather than on Twitter accounts affiliated with Boko Haram's ally, IS.

Otto explained that al-Barnawi has been praising IS activities, such as the attack on French magazine Charlie Hebdo in Paris in January 2015.

"Al-Barnawi has recently been reaching out to ISIL after French military intervention cut Ansaru [Boko Haram's splinter] ties with Al-Qaeda in the Islamic Maghreb. Recently, Al Barnawi used a new Boko Haram Twitter account , al - Urhwa al Wutqha - but significantly he has not mentioned Shakau in the tweets at all," Otto said.

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Note: This article was corrected on 12 August to remove reference to Abu Musab al-Barnawi having defected from Boko Haram.