Nairobi, 29 June-(ANA)-Kenya's police have denied claims of torture and rape when they disarmed rival clan militias last year.
Human Rights Watch says there should be an inquiry into the "collective punishment" of civilians in Mandera.
The US-based organisation said its research showed thousands of people had been tortured and women had been raped.
But police spokesman Eric Kiraithe said there had been no torture or beatings and asked HRW to produce evidence to back up its findings.
Earlier this year a UN investigator into allegations of extrajudicial killings elsewhere in Kenya, Philip Alston, said the police were a "law unto themselves".
According to Human Rights Watch, a joint police and military operation to disarm the warring militias in the north-eastern town of Mandera took place between 25 October and 28 October 2008. (ANA)