
General Buhari escaped a bomb attack unhurt on July 23.
Mr Abba told a news conference in Abuja on Monday that preliminary reports of investigation indicated that the claims were untrue.
The Inspector-General promised to make public the outcome of the investigations as soon as it is done.
It was the IGP’s maiden strategic meeting with senior police officials from various police commands across the country.
The IGP’s statement lays to rest claims by some government’s critics that the government had planned the attack.
“As discovered by police investigators, there is no truth to claims that the attack was political,” Mr Abba said.
He also gave reasons for the early deployment of officers and men of the Nigeria Police Force in preparation for the Osun State governorship election.
The opposition All Progressives Congress had condemned the deployment of the security personnel in the state, saying it will create an artificial atmosphere for election.
The Inspector-General of Police assured the public of the safety of lives and property under his leadership.
After the attack on Buhari, the All Progressives Congress (APC), the party he belongs to, called for an international inquiry into the assassination attempt to unravel the motive and the perpetrators of the dastardly act that could have plunged the country into a deep turmoil, had it succeeded.
In a statement issued days after the attack by its National Chairman, John Odigie-Oyegun, the party said that it does not have the confidence that the Nigerian security agencies could carry out an impartial investigation, because they work for the Government instead of the nation.
It said that the call had become more urgent because the agents of the Federal Government had started muddling the waters with their statements and actions on the attack.