At least 36 quarry workers were Tuesday morning killed by suspected Al-Shabaab militants in an attack in Koromei area, Mandera County.
The workers were ambushed as at the site as they slept by gunmen believed to be the militants and killed by shooting.
Others were decapitated by the attackers. Other reports say the attackers kidnapped some of the workers. All the victims are non-Muslims.
Those who were Muslims were separated from Christians. Police confirmed the deaths and added they were yet to know the motive. The attack came hours after another group launched an attack on a club in Wajir that left one person dead and 13 wounded.
Last week, 28 people, mostly teachers were shot dead after the militants hijacked their bus in Mandera County.