"One thing the prime minister will want to take to the G8 summit concerning Iran is that we obviously view the regime there as extremely dangerous, as a serious threat," said Harper's spokesman Dimitri Soudas.

He added that Harper would like to see G8 leaders "come together to have a dialogue on the issue of Iran ... and come out with a coherent position to deal with this dangerous regime that also has a nuclear proliferation program with a clear objective."

The G8, comprising Britain, Canada, France, Germany, Italy, Japan, Russia and the United States, gathers in the Italian city of L'Aquila from Wednesday until Friday.