Police said they were arrested this afternoon under various IPC sections, including 304 (culpable homicide not amounting to murder).
The airport was temporarily shut down after the clash between CISF and fire department officials of AAI following an argument over frisking of some personnel around 9.40 pm on June 10.
"In the ensuing scuffle, a firearm belonging to a CISF personnel went off killing a CISF head-constable while the official who was holding the firearm sustained burn injuries on hand and he is hospitalised. The scuffle continued for some time," an official release had said.
The airport was closed for at least six hours and flight operations resumed only on July 11.
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Meanwhile, ADGP (North Zone) N Shankar Reddy submitted a preliminary report on the violence to Director General of Police.
"A preliminary report on what exactly happened was furnished to DGP," Reddy told PTI.
"Everything is on CCTV," Reddy said when asked who was responsible for the violence and gun shot that followed.
"The incident is involving two Central government organisations. We will go by evidence and will follow up with legal procedures," Reddy added.