Right activists in Mombasa on Wednesday asked the government to probe alleged forced disappearances, extra-judicial killing of al Shabaab returnees.
This followed the killing of two suspected returnees whose bodies have been lying unclaimed at the Coast General Hospital mortuary since last Thursday.
The bodies were taken to the mortuary after they were found dumped at Shimba Hills forest, Kwale county with gunshot wounds on the head.
Francis Auma, Haki Africa field officer, said the police must be held accountable to explain the circumstances under which the two died.
He said it is unfortunate that the police are yet to conduct a forensic examination of the two bodies.
"We are just appealing to officers to speed up investigations, identify the deceased, and thoroughly probe and arrest those who might be responsible."
Auma added that the investigation will end growing speculation that the two were executed by security agents.
The two bodies were found decomposing in the forest and had no identification documents.
A preliminary police report indicated that they might have been tortured before they were shot dead at close range.
"Detectives are relying on fingerprints lifted from their bodies to identify the two," a senior officer, who sought anonymity, said.
"An autopsy will be conducted once we get the families of the two to assist in the investigation," the officer added.
Sources within the National Intelligence Service and DCI said the two might have been on police terror watch.
Kenyan authorities have denied orders for extra-judicial killings and have blamed the 'isolated' cases on rogue cops.
Last year, Haki Africa documented 78 killings and enforced disappearances in two months, in Mombasa county.
On Tuesday, US envoy Robert Godec held a closed-door meeting with Haki Africa on amnesty for al Shabaab returnees.
The Haki official spoke even as the body of another victim of the shootings was taken to the mortuary.
Sudi Abdi was shot after a foiled robbery in Kisauni.
Area police boss Christoper Rotich told The Star the suspect was one of the notorious criminals who terrorise residents.
"He attempted to attack our officers on patrol and was gunned down. A crude weapon was recovered."
Also read: s