The 1985 bombing of Air India Flight 182 off Ireland , the deadliest aircraft terror attack until the September 11 , 2001 attacks , and the attempted bombing of Air India Flight 301 , were allegedly carried out by Sikh extremists . Inderjit Singh Reyat , a member of the ISYF , was found guilty of manslaughter for making the bombs and had to spend more than 20 years in prison at Canada , and is the only individual convicted in these attacks as of 9 Feb 2009
Air India Flight 182
Air India Flight 182
International Sikh Youth Federation