( dpa ) - A bomb exploded inside Colombo's main railway station Sunday afternoon, injuring at least 30 people, police said.
The incident came just hours after a grenade explosion in the national zoo in the capital that injured eight people.
On Saturday 20 passengers were killed when a bomb exploded on a bus in Dambulla, 148 kilometres north of the capital. The government blamed Tamil rebels for that blast.
Security in the capital has been stepped up as the country is marking the 60th anniversary of independence from the British on February 4 with a military parade presided over by President Mahinda Rajapaksa.