Many killed in Sri Lankan bus bombing

Sri Lankan army soldiers guard the site of the roadside bomb attack on a bus in Buttala, 235km from the capital, Colombo. At least 28 people were killed and dozens wounded in the incident, which is suspected of being the work of Tamil Tiger rebels Photograph: Lakruwan Wanniarachchi/AFP

Staff transport a victim of the bus explosion for treatment at a hospital in Buttala Photograph: Wasantha Chandrapala/AP

Relatives of the victims of the bomb attend the hospital in Buttala Photograph: Indka Gurusinghe/AP

A relative attends to a victim of the bus bombing Photograph: Indka Gurusinghe/AP

Shocked relatives of victims of the blast break down in tears at the Buttala hospital Photograph: Lakruwan Wanniarachchi/AFP

After the blast, gunmen shot passengers as they tried to flee, according to witnesses Photograph: Lakruwan Wanniarachchi/AFP

A 10-year-old child wounded in the bombing sits on a hospital bed Photograph: Lakruwan Wanniarachchi/AFP

An injured bus passenger receives medical treatment in a hospital in Padaviya Photograph: EPA

Witnesses of the terrorist attack described the scene as a bloodbath Photograph: Lakruwan Wanniarachchi/AFP

The body of a victim of the explosion lies on the floor of the Buttala hospital Photograph: Lakruwan Wanniarachchi/AFP