Mohammed Adamu, acting inspector-general of police (IGP), has appeared before the senate to brief lawmakers on insecurity in the country.
The upper legislative chamber of the national assembly summoned him last week.
At plenary on Tuesday, Ahmad Lawan, senate leader, moved a motion for the senators to usher the police chief into the chamber.
Thereafter, Senate President Bukola Saraki announced that the meeting would hold “behind close-door because of the sensitivity of the issue”.
Adamu was summoned Adamu following the killing of Faye Mooney, an official of Mercy Corps Nigeria, and Matthew Oguche, her partner, at the Kajuru Castle in Kaduna state.
They both died after they were caught in a cross fire between police officers guarding the castle and suspected bandits.
Recently, kidnappers and bandits have wreaked havoc across the country, particularly in Zamfara and Kaduna.
During a sitting last week, Saraki had said “structural approach” was needed to address security challenge.
He had also urged the security agencies to bring the perpetrators to book.
Ibrahim Idris, Adamu’s predecessor, had shunned summons of the senate repeatedly after falling out with the lawmakers.