A threat received by the Air India office in Mumbai to bomb two of its flights sent security personnel into a tizzy on Thursday. The national carrier said an anonymous caller threatened to blow up AI 945 Chennai-to-Hyderabad and AI 143 Chennai-to-Delhi. It said the call was declared “non-specific” by the bomb threat assessment committee, which advised that all laid down procedures be followed. “Air India has stepped up security measures. All flights are operating as per schedule,” it added.

Following the call, police and airport authorities took stock of the situation, officials said at the Chennai airport.