Amal Raj hailing from Tamil Nadu was stabbed at the back of his head and found dead last evening while on duty, Ri-Bhoi Superintendent of Police C V S Reddy told PTI.
He said the police was informed of the matter at around 7:30 PM yesterday and police personnel from Umiam PS rushed to the airport to take up the matter.
A case was registered and after initial investigation, constable B K Singh hailing from Uttar Pradesh, was arrested, Reddy said, adding, personal issues may have been the cause of the murder.
Shillong Airport is about 35 km away from here and is the only semi functional airport in the state.