blast. look at the charred remains. this tremendous fireball shook this neighborhood about 6:00 last night t shattered windows and buildings blocks away. it shook cars. about a dozen people were hospitalized. we have three injuries critical or serious. what is interesting about injuries. you do have burn injuries and smoke inhalation. the predominant injuries are traumatic in nature, concussion, broken bones. things resulted not necessarily from the heat of the fire but from the force of the blast, bill. bill: we re hearing construction may have led to this. is there an explanation, mike, how that could have happened? well the city leaders this morning pointed towards construction crews with missouri gas and electric who were working in the area. the people who came out here, eyewitnesses to the scene, said there was an overwhelming smell of gas in the area in the hour leading up to the explosion. we finally called the gas company.