KARACHI- Two persons were killed in firing incidents in different parts of the city today. Unknown criminals opened fire at a shop near Expo Centre due to which two persons were injured. They were shifted to a nearby hospital for medical care where one of the wounded, named Shams, succumbed to his injuries. According to police, the incident occurred during a robbery attempt. Another person was gunned down near the Bakra Peedi area of Malir. The deceased person has not been identified yet.