The slaughter of 28 people on a bus in Kenya is a bid to start a religious war, a senior adviser to President Uhuru Kenyatta has told the BBC. Abdikadir Mohammed called on Kenyans of quot;all faiths and creedsquot; to stand together against the quot;heinous crimesquot;. At dawn on Saturday, al-Shabab gunmen attacked the bus in northern Kenya, shooting dead non-Muslim passengers. The Somalia-based Islamist group has carried out numerous attacks across Kenya since 2011. Survivor Ahmed Mahat told the BBC how the bus attack took place The bus was travelling to the capital, Nairobi, when it was stopped in Mandera county, not far from the border with Somalia. Gunmen separated out...