Kigali, May 16, 2010, SPA -- Two grenade blasts in Rwanda's capital Kigali have killed one person and wounded at least 28 people, the latest of a series of attacks, police and medics said on Sunday. The explosions happened within an hour of each other on Saturday evening. Witnesses said men in civilian clothes threw the first grenade from a moving car at a busy market area at around 7 p.m. The second grenade was thrown at a bus park in Kigali's Nyabugogo district. "Investigations have begun into the blasts. It's too early to establish a relationship with earlier blasts. We are still comparing the evidence," police spokesman Eric Kayiranga told Reuters. There have been at least six grenade attacks in Kigali since early December. --SPA 13:45 LOCAL TIME 10:45 GMT www.spa.gov.sa/781535