Kenya’s police squads have admitted for the first time to carrying out extrajudicial killings.

Speaking to Al Jazeera’s Investigative Unit, the officers discussed their involvement in the Kenyan government’s assassination programme targeting suspected Muslim radicals.

Britain and the US have provided millions of dollars to Kenya’s police, and officers claim Western security agencies know about the killings -- allegations that have been denied.

Al Jazeera's Simon Boazman reports from Nairobi.