Senators from opposition parties have issued a six-week ultimatum to President Muhammadu Buhari to tackle the security challenges bedevilling the country.

They also threatened to commence the impeachment proceedings against the President should he fail to address the insecurity within the period given by the lawmakers.

The Senators staged a walk-out of the plenary when Senate President Ahmad Lawan refused to accede to a motion moved by Minority Leader Philip Aduda that the Senate should debate the cases of rising insecurity in the country.

The Senators, who briefed newsmen after walking out on the Senate, insisted they had during their closed-door session which lasted for two hours agreed that they should debate the issue of insecurity and give Buhari an impeachable ultimatum notice.