Blast rocks Kenyan capital

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A loud blast struck the Kenyan capital and television pictures showed a fire raging in a badly damaged building.

At least one wounded person could be seen lying in the middle of a road as emergency services arrived to tackle the blaze. Smoke billowed into the air.

It was not immediately clear what caused the explosion. There has been a string of attacks in Nairobi and the port city of Mombasa blamed on Somali militants and their sympathisers since Kenya sent troops into Somalia in October, Reuters reports.