(CBS/AP) TORONTO - Canada has shut its embassy in Tehran, severed diplomatic relations and ordered Iranian diplomats in Canada to leave, accusing the Islamic Republic of being the most significant threat to world peace.
The surprise action reinforces the Conservative government's close ties with Israel but also removes some of Washington's eyes and ears inside the Iranian capital.
The move also underscores the widening gaps between Western countries' attempts to isolate and punish Iran over its nuclear program and Tehran's efforts to forge closer ties with energy-hungry Asian trading partners such as India and Pakistan to counter Western sanctions.
Canada's Foreign Affairs Minister John Baird said that the embassy in Tehran would close immediately and Iranian diplomats in Canada have been given five days to leave.
A spokesman for Iran's foreign ministry, Ramin Mehmanparast, called Canada's decision "hasty and extreme" and said that Iran would soon respond, the semi-official Fars news agency reported.
Baird said Canada was officially designating Iran a state sponsor of "terrorism" and gave a long list of reasons for Canada's decision, including Tehran's support for Syria's embattled President Bashar Assad in that country's civil war.
A note in Persian posted on the door of Iran's embassy in Ottawa read: "Because of the hostile decision by the government of Canada, the embassy of the Islamic Republic of Iran in Ottawa is closed and has no choice but to stop providing any consular services for its dear citizens."
"The Iranian regime is providing increasing military assistance to the Assad regime; it refuses to comply with U.N. resolutions pertaining to its nuclear program; it routinely threatens the existence of Israel and engages in racist anti-Semitic rhetoric and incitement to genocide," Baird said in a statement. "It is among the world's worst violators of human rights; and it shelters and materially supports terrorist groups."
Baird said he also was worried about the safety of diplomats in Tehran following attacks on the British embassy there.
Britain downgraded ties with Iran following an attack on its embassy in Tehran in November 2011, which it insists was sanctioned by the Islamic Republic's ruling elite. After the attack, Britain pulled all of its diplomats out of Iran and expelled Iranian diplomats from U.K. soil.
Most European countries maintain a diplomatic presence in Tehran despite increased tensions over European Union sanctions that block imports of Iranian oil. The Swiss represent diplomatic interests of the United States, which broke ties with Tehran after protesters stormed the U.S. Embassy in the chaotic months following the Islamic Revolution in 1979. Fifty-two Americans were held for 444 days.
Canada's break with Iran removes another channel for Washington to get first-hand diplomatic assessments of Iranian affairs. Canada and Britain had been main conduits of information for the U.S., which also maintains special Iranian monitoring offices in several locations including Dubai.
But Canadian relations with Iran have been strained since former Canadian Ambassador Ken Taylor helped rescue six Americans during the hostage crisis three decades ago. The countries resumed normal diplomatic relations with an exchange of ambassadors in 1996.
But relations soured again in 2003 after Zahra Kazemi, a freelance photographer with dual Canadian-Iranian citizenship, died in custody. Kazemi was arrested while taking photographs outside a Tehran prison in 2003.
Canada also has criticized Iran over the arrest of pioneering Canadian-Iranian blogger Hossein Derakshan, who helped develop the first Farsi language blogs and is considered one of the founders of Iran's social media community. Derakshan was detained in 2008 and sentenced to nearly 20 years in prison two years later.
Canada hasn't had a fully accredited ambassador in Tehran since Iran ordered Canada's ambassador, John Mundy, to leave the country in 2007 after trying unsuccessfully to come to an agreement on an exchange of ambassadors for some time.
Baird said the skeleton staff that was operating Canada's embassy has already fled the country.
"The Iranian regime has shown blatant disregard for the Vienna Convention and its guarantee of protection for diplomatic personnel," Baird told reporters in Vladivostok, Russia, on the sidelines of the 21-nation Asia-Pacific Economic Co-operation forum. "Under the circumstances, Canada can no longer maintain a diplomatic presence in Iran. Our diplomats serve Canada as civilians and their safety is our No. 1 priority."