The Islamic State has claimed responsibility for the attack, which killed at least 39 people.
“Deeply saddened, I express my closeness to the Turkish people, I pray for the many victims and the injured and for the whole nation in mourning,” Pope Francis said. “I ask the Lord to support all people of good will who courageously roll up their sleeves to face the plague of terrorism and the bloody stain that envelops the world with a shadow of fear and bewilderment.”