Some unnamed officials in the Civil Aviation Authority and Pakistan International Airlines admitted that initial reaction to the terrorist attacks had not been very good.
"Some foreign airlines have already either suspended their flights into Karachi or are reviewing their present flight operations from different destinations to the Jinnah international airport," an official said.
A marketing head of a foreign airlines told PTI that their head office in Hong Kong had suspended two flights to Karachi this week.
Ten terrorists and at least 26 security officials or civilians were killed in the deadly six hour long siege of the old airport terminal building on Monday.
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One source in PIA pointed out that the second attack yesterday has made the things worst.
According to the Airport Security Force, two militants tried to break into the ASF base near the old airport but fled after strong retaliation from security forces.
Since 9/11 Karachi has already lost lot of air traffic due to concerns over the security situation in Pakistan with many foreign airlines winding up their regular services from Pakistan's biggest city and financial hub.
"At the moment most flight operations come from airlines belonging to the middle east and traffic to these countries is the most from this airport," one flight operations person at the Jinnah airport told PTI.