The body of a man who had been missing for three days was found buried in a shallow grave in Takaba, Mandera County.
Police said the body was recovered from Kotokoto forest and later identified as that of Hassan Mohamed Salat aged 55.
He had been killed and buried in the grave, police said, adding they are investigating the murder.
The body had visible injuries when it was exhumed on May 26 by locals.
Police said he had been missing for three days and no report was made.
The body was moved to a local mortuary pending autopsy and probe. It was later released to the family for burial amid the probe.
Police say they are yet to establish the motive of the incident.
The area is near the Kenya-Somalia border which is usually breached by terrorist group al-Shabaab.
Meanwhile, four people were lynched in separate incidents in the country. The victims were accused of being thieves.
Police discourage mob lynching and call it criminal.
The first incident happened in Isebania town in Migori County on May 26 where two bodies were recovered in separate places.
Police said both men were subjected to mob injustice on suspicion of stealing a motorcycle.
The bodies were removed to Migori County Referral Hospital mortuary pending autopsy and identification.
In Bungoma’s Kananachi village, a man was subjected to mob injustice for stealing a chicken.
Along Muranga Road, Nairobi, a man was killed by a mob after he snatched a mobile phone from a pedestrian on May 27.
The man was stoned to death. Police arrived at the scene and moved the body to the mortuary.
Cases of mob lynching have been on the rise amid calls to avoid such decisions by the public.
Police spokesperson Dr Resla Onyango said victims of mob lynching are innocent until courts prove otherwise.
“Mob lynching is criminal. Those caught will face the law,” she said.