MICHAEL GEORGY  LEBANESE protesters have stormed government ministries in Beirut and trashed the offices of the Association of Lebanese Banks, TV footage showed, as shots were fired in growing protests over this week's devastating explosion. A policeman was killed during the clashes, a spokesman said. A policeman at the scene said the officer died when he fell into an elevator shaft in a nearby building after being chased by protesters. The Red Cross said it had treated 117 people for injuries on the scene while another 55 were taken to hospital. A fire broke out in central Martyrs' Square. Dozens…