Canadian Prime Minister Stephen Harper has paid tributes to victims of the Air India bombing and said that his government was committed to prevent such acts of terrorism from happening again.

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"On this day, the anniversary of the worst terrorist incident in Canadian history -- the bombing of Air India flight 182 -- we pause to remember those who have lost their lives through acts of terror here in Canada [Images] and around the world," he said on Monday.

"The government of Canada remains committed to supporting the victims of terror and vigilant to preventing such acts of terrorism from happening again," Harper said in a statement to mark the fourth annual National Day of Remembrance for Victims of Terrorism.

"As incidents such as the bombing of Air India Flight 182 on June 23, 1985, and the attacks of September 11, 2001, have shown, Canadians are not immune from the threat of terrorism," the prime minister said.

"We take this day to honour the victims of terror by commemorating their loss. It is our hope that those who have died will not be forgotten and that those who grieve will find comfort. Our thoughts and prayers will forever be with them," he added.