Part of President Ahmadinejad's message of condolence reads, the news of the blast in your country's biggest gas refinery which resulted in death and injury of several of our compatriots was saddening and regrettable.

An explosion tore in Amuay refinery, Venezuela's biggest refinery, on Saturday killed 39 people and wounded dozens more, halting operations at the facility in the worst accident to hit the OPEC nation's oil industry.