New Delhi: A US-bound flight of Air India from Mumbai made a precautionary landing in London Thursday following a bomb threat, the airline said. All the 327 passengers have been deplaned and served snacks and other beverages, at the London's Stansted airport.

"AI 191 Mumbai-Newark of June 27 has made a precautionary landing at London's Stansted airport due to a bomb threat," the airline said.

“An Air India Boeing 777 diverted into London Stansted Airpirt at approximately 10:15 hrs and landed safely with Essex police in attendance. It is parked on an isolated stand away from the normal airport operations,” the Stansted airport said.

Later air India Spokesperson said that the bomb threat was declared a hoax.

Air India 191 Mumbai-Newark flight has landed safely at London and all passengers are safe. Earlier, the flight had made a precautionary landing due to a bomb threat that was declared hoax, he said.

As per reports the airport was briefly shut down during the Air India flight's landing. The runway re-opened later and is now fully operation, the airport said in a statement.

"Our runway has now re-opened and is fully operational following a precautionary landing of Air India flight," the airport said.

"All the 327 passengers are deplaned and served snacks and other beverages. All passengers are in airport premises," AI spokesperson Dhananjay Kumar said.