Mexico's Popocatepetl volcano spews smoke, ash as alert level stays raised

Mexico's Popocatepetl volcano spews smoke, ash as alert level stays raised
Ash blankets towns in central Mexico near Popocatepetl volcano as it continues to spew smoke and ash into the sky, a day after Mexican authorities raised the warning level to "yellow phase three", which means "remain alert and prepare for a possible evacuation".