The crash occurred at 1:50 p.m., and witnesses reported smoke rising from the mountain.
"A P-3 maritime patrol aircraft that took off for training from an air base in Pohang at 1:43 p.m. crashed at a nearby location due to unidentified reasons," the Navy said in a notice to reporters.
The Navy confirmed that four people were aboard the aircraft, saying it is investigating further details, including casualties.
Fire authorities have been dispatched to the scene to extinguish the fire.
AzVision.az
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