The Iran-backed Huthi rebels blamed the Saudi-led coalition for Saturday's attack, one of the deadliest since it launched a military campaign against the Shiite insurgents in March 2015.
After initially denying any involvement, the coalition later said it would "immediately investigate" the incident.
"The Saudi-led coalition must move forward now on its commitment to investigate this incident," Canadian Foreign Minister Stephane Dion said yesterday in a statement condemning the attack.
"Canada calls on all parties in Yemen to avoid an escalation of violence as a result of this incident."
The Huthis swept into Sanaa in September 2014 and advanced across much of Yemen, forcing the internationally recognised government of President Abedrabbo Mansour Hadi to flee.
The conflict has killed more than 6,700 people -- almost two thirds of them civilians -- and displaced at least three million since the coalition launched military operations, according to the United Nations.
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