Somali islamists execute 28 nonmuslims on kenyan bus
Kenyatta calls for unity following deadly al-Shabaab attack
A massacre near the country's border with Somalia this morning left 36 quarry workers dead.
The group said its mujahideen fighters had killed 40 people despite initial reports of 36.
All the victims were shot in the head, except for four who were beheaded.
The strike is in retaliation to an ambush which killed 28 people on a Nairobi-bound bus.
Three of the group led out to be killed saved their lives by reciting verses of the Koran for the militants.