The six suspects were paraded on Wednesday at the state headquarters of the Department of State Security Services (DSS)
The state Director of the DSS who briefed journalists said the suspects were tracked and arrested at different locations in Igabi, Soba, Kachia and Jos in Plateau State.
Gunmen had intercepted the convoy of the royal father at Maikyali village along Kaduna-Kachia Road on October 19 and opened fire on the vehicles which forced them to come to a halt.
The traditional ruler’s wife, however, regained her freedom two days after, but he was held hostage by the abductors who demanded a ransom from his family.
About a week later, the state government announced that the monarch had been killed.
The Senior Special Assistant to the governor on Media and Publicity, Mr Samuel Aruwan, made the announcement in a statement he issued on October 26.
According to the statement, the body of the traditional ruler was found near a bush at Kateri area along the Kaduna-Abuja highway in the early hours of Friday.