"The Prime Minister echoed President Obama's concerns on today's news regarding nuclear proliferation in Iran," Harper's spokesman Dimitri Soudas told reporters on the sidelines of the Group of 20 summit in Pittsburgh.
Harper "supports whatever actions are necessary," he said.
"I gather the UN Security Council will be having discussions around this issue and I won't speculate on these discussions," he said. "It is pretty serious."
US President Barack Obama, French President Nicolas Sarkozy and British Prime Minister Gordon Brown revealed Friday that Iran had admitted to the UN nuclear watchdog that it had built a second uranium enrichment plant.
"We expect the IAEA to immediately investigate this disturbing information and to report to the IAEA board of governors," Obama said, branding the new plant a "direct challenge" to international non-proliferation rules.
This week, Canada boycotted Iranian President Mahmoud Ahmadinejad's speech to the UN General Assembly, calling the Islamic republic leader's remarks denying the Holocaust "disgraceful.
"This regime has been anti-Semitic, has very dangerous views vis-a-vis Israel but also we have been very, very concerned about its nuclear plans," Soudas said.
