Bhubaneswar: Stepping up its probe into the bomb blast that rocked Bhubaneswar’s Sundarpada area two days ago, the National Investigation Agency (NIA) on Thursday questioned those injured in the incident. As per information, a team of NIA officials visited the hospital in the capital city where those injured in the explosion are undergoing treatment. The team members examined the blast site and questioned several people of the locality. As per police, those involved in the bomb making already face at least seven criminal cases registered at different police stations in the capital city. He was involved in an attempt to murder and criminal cases related to explosives, Meena told reporters.