A spokesman for Islamist group Boko Haram has ruled out further talks with Nigeria's government after preliminary, indirect contacts aimed at ending scores of deadly attacks. "Almighty God has told us repeatedly that the unbelievers will never respect the promises they made," Abul Qaqa told journalists in a telephone conference late Tuesday. "As such, henceforth, we would never respect any proposal for dialogue. In fact, we have closed all possible doors of negotiation. We would never listen to any call for negotiations."