More than 90 fake bomb threats have been made against flights operated by multiple Indian airlines this week, Indian media reported on Sunday, sparking fear among passengers and global delays.
All flights landed safely, but the spate of threats has resulted in planes being diverted to Canada and Germany, and fighter jets scrambled to escort aircraft in the skies above Britain and Singapore. India's government and civil aviation authorities have warned that "very strict action" will be taken.
New Delhi's civil aviation authorities have not said how many threats have been received in the past week, but the Times of India and broadcaster News18 reported more than 70 hoaxes targeting both domestic and international flights since October 13.
At least 30 hoax threats were made on Saturday alone, and at least 20 more threats were made to different airlines on Sunday. India's IndiGo airline confirmed threats were made against six of its flights on Sunday.
Two were on domestic routes, and four were international -- linking Indian cities to Saudia Arabia's Jeddah and Dammam, as well as two separate flights to Istanbul in Turkey.
"The safety and security of our passengers and crew is our highest priority," IndiGo said in a statement.
"We are working closely with the relevant authorities and taking all necessary precautions."
The global impact of delays and diversions has been heavy on airline schedules and costs. At least one person -- a minor -- has been arrested in India, but the threats have continued.
"All others responsible for the disruptions will be identified and duly prosecuted," India's aviation minister Ram Mohan Naidu said after the arrest on Wednesday.
A report in The Indian Express said that an anonymous account on X, was suspended after posting bomb threats to at least 40 flights on Friday and Saturday.