"Those who have lost their lives as well as all those touched by this catastrophe are in my prayers," Francis said during angelus prayers at St Peter's in Rome during the Catholic Feast of the Assumption, which marks Christ's mother Mary's ascent to heaven.
The gigantic series of explosions began after a fire in a warehouse in the northeastern city on Thursday, with more residents being evacuated Saturday over fears that highly-poisonous sodium cyanide had been released.
