Somalia's al Shabaab rebels vowed on Thursday to fight Kenya after its troops entered the Horn of Africa nation and called on sympathisers to carry out major attacks in east Africa's biggest economy. The call to arms came 12 days after Kenya sent soldiers into Somalia to battle the al Qaeda-linked rebels Nairobi blames for a string of kidnappings on Kenyan soil and frequent border incursions threatening state security. Unknown militants attacked a vehicle in northeastern Kenya near Somalia on Thursday killing at least four government employees, local officials told Reuters, the third strike in the east African country this week. Two separate grenade blasts in the capital Nairobi on Monday killed one person and wounded nearly 30. A Kenyan man has pleaded guilty to one of the attacks and being a member of al Shabaab. There were also Kenyan media reports gunmen had ambushed Kenyan soldiers near a town inside Somalia.
