Abuja - Two former Nigerian leaders issued a rare joint statement on Sunday calling for talks to end a deadly insurgency by the Islamist group Boko Haram, warning the violence could put the nation's unity at risk.

Former president Olusegun Obasanjo and ex-military ruler Ibrahim Babangida, who have been rivals in the past, said in the statement that the killings had become “unbearable” and had led to a nation “gripped by a regime of fear”.

“Unfolding events in our dear motherland, Nigeria, over the last few years are threatening to unravel the nearly century-old labour of our founding fathers and subsequent generations in building a strong, united, peaceful nation,” the statement said.

Without mentioning Boko Haram by name, they called for “community involvement” in addition to security measures to resolve the crisis, urging efforts from local governments, religious leaders and grassroots organisations.

“Religious leaders, in particular, have an even greater challenge to use the immense virtues of this holy period (Ramadaan) to inculcate among the millions of citizens the spirit of mutual respect, humility and forgiveness,” the statement said.

“Ample opportunities are therefore at hand to bring all armed belligerents to the table for meaningful dialogue with the authorities for our future and that of our children and grandchildren.”

The statement also said that “for us, and we believe for millions of ot