Five die, six injured in explosion at Spanish fireworks factory

A column of smoke rises from a factory after an explosion at a fireworks factory on the outskirts of Zaragoza, northeastern Spain, August 31, 2015. Four people were missing and four were seriously injured after an explosion on Monday at a fireworks factory near Zaragoza, northeastern Spain, emergency services said.REUTERS/Luis Correas

ZARAGOZA, Spain (Reuters) - Five people died and six were injured in an explosion at a fireworks factory on Monday near Zaragoza in northeastern Spain, officials said.

The cause of the blast at the factory on the outskirts of the city near the airport was unknown.