Drone fires on area in northwestern Karachi , sources say . Airport Security Forces says it was involved in first Karachi airport attack . Saima Mohsin claim responsibility for both attacks in Pakistan June 10 . The U.S. Justice Department charged former TTP chief Hakimullah Mehsud in 2010 for his alleged involvement in a 2009 bombing at the United States ' Forward Operating Base Chapman in Khost , Afghanistan . The latest assault targeted the Airport Security Forces academy near the airport .
Drone fires on area in northwestern Karachi , sources say . Airport Security Forces says it was involved in first Karachi airport attack . Saima Mohsin claim responsibility for both attacks in Pakistan June 10 . The latest assault targeted the Airport Security Forces academy near the airport .