UK FCO TRAVEL ADVICE: Countrywide – UK citizens advised that mugging, kidnapping, car-jacking and armed robbery occur particularly in Nairobi, Mombasa and other large cities. Foreigners are not generally targeted, but incidents resulting in the death of 4 British nationals have occurred in the period August-September 2013.
https://www.gov.uk/foreign-travel-advice/kenya/safety-and-security