Twenty-six people were hurt today, some critically, after a man set fire to a busy bank in Australia with one witness saying he heard a big blast and children screaming, the Police said adding that the man entered the Commonwealth Bank branch in the Melbourne suburb of Springvale with flammable liquid. <br/><br/>The motive was not clear and Poida said it was too early to tell if it was terror related. Paramedics said six of those injured were in a critical condition. One is believed to be the suspect, who is under police guard in hospital.