An unidentified person made a call to the airport authorities saying that explosives have been planted onboard the Jet Airways Flight 260 that took off from New Delhi in the afternoon.
Shortly after the aircraft with 169 people including crew landed at the airport at around 4:30 pm, the passengers were safely evacuated.
Search operations were carried out inside the aircraft which was taken to the isolation area.
There was panic in the airport as soon as the news was spread.
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However, after the inspection was complete, the bomb threat turned to be a hoax. No explosives were found inside the aircraft.
"We had carried a thorough investigation of all the baggage, passengers and aircraft seats, where noting was found," a senior official at the airport said.
Passengers were safely evacuated from the Jet Airways after it touched down at the airport here.
All domestic as well as international flights were suspended for about an hour due to the incident.
Earlier, the Jet Airways plane had experienced difficulty in landing due to poor visibility in Kathmandu. The aircraft had to make six rounds above Simara in Bara before making an emergency landing following the bomb threat alert, Himalayan Times reported.
Security personnel, including Nepal Army's bomb disposal squad were mobilised for carrying out search operations.
Security was tightened inside the airport after the threat was received. The flight services were resumed as normal after the search operation.