Add Yahoo as a preferred source to see more of our stories on Google. The Middle East is in the grip of an "unprecedented" catastrophe that could "spin out of control", the World Health Organisation has warned, as the US, Iran and Israel unleash their heaviest exchange of fire since the war erupted.

In addition to raising concerns about a humanitarian crisis and setting off a global energy crisis, the war in Iran is emerging as a major environmental disaster.

HAVANA (AP) -- Cuba's debilitated health care system has been pushed to the brink of collapse by the U. S. blockading the country's oil supply, a Cuban official said Friday.