clipped from: www.msnbc.msn.com 
TEHRAN - Angry Iranian motorists lined up for gasoline for hours on Wednesday after the world’s fourth-largest oil exporter imposed fuel rationing, sparking chaotic scenes and the torching of at least two pump stations.
One Iranian news agency, Fars, said 12 gasoline stations were set ablaze in Tehran after the government’s announcement late on Tuesday, but only two could be independently confirmed.
Some drivers had scuffled while waiting to fill up their tanks before the rationing started at midnight. Others openly criticized President Mahmoud Ahmadinejad’s government, which came to power vowing to share out Iran’s oil wealth more fairly.
Despite its huge energy reserves, Iran lacks refining capacity and must import about 40 percent of its gasoline, a sensitive issue when world powers have threatened new U.N. sanctions in a row with Tehran over its nuclear program.
