Two gunmen opened fire at a security training facility at the Karachi airport, one day after Pakistan's busiest airport was stormed by Taliban militants.
The Pakistani Taliban claimed responsibility for the June 10 attack.
A spokesman for the Airport Security Force said the attackers, who were on a motorcycle, fled after Pakistani forces retaliated.
No casualties were reported, despite earlier reports of five killed.
Officials said flights resumed after a brief suspension.
An attack on the cargo terminal of the Karachi airport late on June 8 left at least 35 people dead, including the 10 attackers.
The Pakistani Taliban said the attack was in retaliation for the death of their leader in a U.S. drone strike last year.
Earlier on June 10, the Pakistani military said it had carried out air strikes in tribal areas in the country's northwest, killing at least 15 militants.
Based on reporting by AFP, Reuters, and dpa