The twin-engine military transport aircraft used in high-altitude regions crashed at around 10am soon after take-off.
The air force said the accident happened during a routine sortie involving an Antonov AN-32 aircraft at around 10am at Jorhat, Assam.
“Crash site management and initial enquiries are on at this time. IAF requests everyone to refrain from speculation till preliminary results are not in,” it said.
The IAF said it “deeply regrets the loss of five personnel” in the crash, releasing the names and pictures of those killed. “IAF extends its deepest condolences to the bereaved families and stands firmly with them in this hour of grief,” it said.