Al Shabaab militants overran a National Police Reserve camp in Fafi, Garissa County and killed six members.
Police said four others were left with serious injuries after the attack that happened at about 5 am in Biyamadhow area.
The attackers ransacked the camp and escaped with an unknown number of weapons.
They shot the victims and stabbed some, police said.
Police said the attackers suffered casualties in the raid on March 23.
The area is near the porous Kenya-Somalia border, which is usually breached by the militants.
Police said multi-agency teams had been dispatched to the region to pursue the gangs planning more attacks.
National police service spokesman Michael Muchiri said they are making more efforts to address the menace that has been persistent despite operations to tame the same.
The bodies of the deceased were moved to a local mortuary while the injured were taken to hospital.
Muchiri said they had sent more personnel to boost operations.
The area has been facing security challenges leaving dozens of people dead.
The terrorists have been attacking the area, affecting development at large. Somalia has not had a stable government for decades.
Security agents have mounted operations in the area in effort to contain the terror-related attacks.
Officials say this has led to the reduction of such incidents in general.
Last week, a police officer was killed in a raid at a police check in Mandera.
The incidents happened even as the US
The embassy issued a new travel advisory warning to its citizens residing in Kenya.
Americans have also been warned against traveling at the Kenya-Somalia border counties, which include Garissa, Wajir, Mandera, Tana River and coastal areas north of Malindi.
Kenyan authorities are yet to respond to the advisory.
The embassy cautioned Americans from traveling to several areas citing security risks such as crime, civil unrest, terrorism, banditry and kidnapping.
Kenya has mounted operations in the region thwarting a number of planned attacks.
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