Popocatepetl volcano spews ash over Mexico City
The Popocatepetl volcano has spewed ash over Mexico City and neighbouring areas, Mexico's national disaster prevention agency said.
The volcano erupted for about nine hours, until 3am local time, the agency said.
Mexico City residents awoke to cars coated in a light dusting of ash.
The disaster agency's monitoring cameras showed glowing rocks from the volcano's crater landing more than half a mile (1,000 metres) down its slope.
About 25 million people live within 62 miles (100km) of the crater of the 17,797ft (5,426-metre) stratovolcano.
It has been periodically erupting since 1994.