 On 23 June 1985 , Air India Flight 182 Emperor Kanishka , a Boeing 747 @-@ 237B ( registered VT @-@ EFO ) was blown up in mid @-@ air by a suitcase @-@ bomb planted by Babbar Khalsa terrorists allegedly as revenge for the Indian Government 's operation on the Golden Temple in June 1984 . The flight was on the first leg on its Montreal @-@ London @-@ Delhi @-@ Bombay flight when it exploded off the coast of Cork , Ireland in the Atlantic Ocean . All 307 passengers and 22 crew on board died . 
