A screengrab taken on May 12, 2014, from a video released by Nigerian Islamist extremist group Boko Haram obtained by AFP shows girls wearing the full-length hijab holding a flag reading "There is no god, but Allah" and "Mohammed is Allah's prophet" at an undisclosed rural location. Boko Haram released a new video on claiming to show the missing Nigerian schoolgirls, alleging they had converted to Islam and would not be released until all militant prisoners were freed. A total of 276 girls were abducted on April 14 from the northeastern town of Chibok, in Borno state, which has a sizeable Christian community. Some 223 are still missing. AFP PHOTO / BOKO HARAM RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / BOKO HARAM" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS