The world's largest marine conservation initiative spans more than 600 sq km, an area equivalent to over 85,000 football fields
Flight 423 was escorted safely back to the airport by Singapore's air force and touched down at about 8 am, The Straits Times quoted the police as saying.
The police searched the Boeing 777-300ER that carried 263 people onboard, but did not find any suspicious item.
All passengers, except for a woman and a child who were held back for questioning, disembarked safely and had to undergo security screening before they could leave.
Preliminary investigation showed that the airline had received a call after the plane left the Mumbai airport on Monday at 11.35 pm. The caller claimed that there was a bomb on the plane.
An airline spokesman told The Straits Times: "Singapore Airlines confirms there was a bomb threat concerning SQ423 operating from Mumbai to Singapore... We are assisting the authorities with their investigations and regret that we are unable to provide further details."
The world's largest marine conservation initiative spans more than 600 sq km, an area equivalent to over 85,000 football fields
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