Two people died on the spot while several others sustained injuries in a grenade blast yesterday evening in Kigali.The incident took place at Ubumwe Village, Kabahizi Cell in Gitega Sector of Nyarugenge District at about 6:50pm near Nyabugogo abattoir better known as "marathon,” at about 6:50 pm.According to police, two people were seriously injured, while 30 others sustained minor injuries. There was quick intervention of security organs and medical services shortly after the explosion, police said in the statement."The injured were immediately evacuated to the University Teaching Hospital of Kigali (CHUK) and Kacyiru Police Hospital (KPH), where they are under intensive care,” it added.One in custodyPolice said it had arrested one person in connection with the blast as investigations continue.  By press time the blast scene had been cordoned-off to allow security organs to gather more evidence.Assistant Commissioner of Police Theos Badege, the Rwanda National Police Spokesperson urged the public to remain calm and to cooperate with security organs to ensure that whoever is behind the blast is brought to book."Rwanda National Police stands with the bereaved families and works round the clock to bring to justice all those responsible for this criminal act like it has been the case in the past,” he said. In March, this year,   a similar incident happened when a hand grenade exploded near Kimironko market in Kigali, killing one person and seriously injuring six others