Triple Suicide Bombings Kill at Least 27 in Chad Boko Haram is believed to be behind the attack on Lake Chad By Newser Editors and Wire Services Posted Dec 5, 2015 10:14 AM CST 20 comments Comments Boko Haram is suspected to be behind suicide bombings that killed dozens of people in Lake Chad on Saturday. A previous attack in March left stores burned in the shore village of N'Gouboua. (AP Photo / Jerome Delay) (Newser) – A Chad security official says a triple suicide bombing at a market on an island in Lake Chad has killed at least 27 people and injured 90 others in the African country. Paul Manka, Chad police spokesperson, said three females carried out Saturday's attack on Koulfoua Island. Gen. Banyaman Cossingar, Chad gendarmerie director general, confirmed the attack, saying Nigeria's Islamic extremist group Boko Haram is suspected. The Lake Chad region—which straddles the borders of Chad, Cameroon, Niger, and Nigeria—has been regularly targeted by Boko Haram. Chad's government has already imposed a state of emergency in the area. Boko Haram, the Nigerian Islamic extremist group whose 6-year uprising has killed some 20,000 people, stepped up attacks this year in neighboring Chad, Niger, and Cameroon after those countries agreed to help fight the insurgents.