Sri Lanka bus bomb kills 21

Police say a bomb explosion on a passenger bus near Sri Lanka's capital has killed at least 21 people and wounded 47 others.

Police spokesman Ranjith Gunasekara said the blast occurred on a passenger bus in Moratuwa, near Sri Lanka's capital Colombo.

Military spokesman Brigadier Udaya Nananyakkara said the Tamil Tiger rebels detonated the roadside bomb, targeting the bus.

There was no immediate comment from Tamil rebels who have fought since 1983 to create an independent homeland for the country's minority Tamils.