Among the rebels controlling Mali\'s northern city of Gao are dozens of Nigeria\'s Islamist Boko Haram group, a regional deputy told AFP on Monday, while a security source confirmed the information. \"There are a good 100 Boko Haram fighters in Gao. They are Nigerians and from Niger,\" said Abu Sidibe, a regional deputy. \"They\'re not hiding. Some are even able to speak in the local tongue, explaining that they are Boko Haram.\" The information was confirmed by a Malian security source.